Comments for Vox Charta » astro-ph

Comment on The Correlated Formation Histories of Massive Galaxies and Their Dark Matter Halos by steaua

steaua — Tue, 22 May 2012 08:00:21 +0000

A comparison with Figure 8 in Peng et al. 2011, arXiv:1106.2546 would have been very useful and interesting.

Comment on Shaping the galaxy stellar mass function with supernova- and AGN-driven winds by steaua

steaua — Tue, 15 May 2012 15:00:16 +0000

A comparison with the blue/red mass functions instead of the total mass function (see Figure 12 in Peng et al. 2010, ApJ, 721, 193) would have been more useful…

Comment on What collisional debris can tell us about galaxies by Hou Jun

Hou Jun — Mon, 14 May 2012 06:17:46 +0000

This paper is closely connected to a more extended and detailed review paper by the same authors (1112.1922). Anyone who is interested in details is welcome to read that review.

Comment on What collisional debris can tell us about galaxies by Yiqing

Yiqing — Sun, 13 May 2012 06:50:28 +0000

looking forward a discussion of galaxy interaction debris

Comment on What collisional debris can tell us about galaxies by Hou Jun

Hou Jun — Fri, 11 May 2012 11:22:03 +0000

A short review focus on what we can learn from galaxy interactions: GALAXY STRUCTURE, PROPERTIES of MERGER, LAW of GRAVITY.

Comment on The Star-formation Mass Sequence out to z=2.5 by steaua

steaua — Wed, 09 May 2012 07:36:22 +0000

The paper has been replaced with a version 2, figures changed.

Comment on The search for habitable worlds: 1. The viability of a starshade mission by gstarkman

gstarkman — Tue, 01 May 2012 14:24:50 +0000

The authors’ complete lack of references to prior work is appalling. There is a long history of work on an occulter approach to TPF, originally proposed by Spitzer, and advocated within the context of the current TPF initiative by
Copi and Starkman (under the name Big Occulting Steerable Satellite) starting in the late 1990s, and Schultz et al (under the name UMBRAS) at about the same time. At least some of the authors are aware of the intellectual provenance of this idea.

Comment on Career situation of female astronomers in Germany by noelia

noelia — Thu, 26 Apr 2012 08:59:36 +0000

Please, take a look at this too:

http://www.americanscientist.org/issues/feature/2012/2/when-scientists-choose-motherhood

Comment on First Evidence of Globular Cluster Formation from the Ejecta of Prompt Type Ia Supernovae by gaston

gaston — Wed, 25 Apr 2012 02:51:55 +0000

I won’t be present on Friday, but I thought this paper presents a possible link between SN and the chemical enrichment of the ISM.

Comment on The Chandra Multi-Wavelength Project: Optical Spectroscopy and the Broadband Spectral Energy Distributions of X-ray Selected AGN by Angie

Angie — Tue, 24 Apr 2012 02:17:31 +0000

I’m not going to be here to talk about it, but wanted to bring this paper to the attention of those who worry about selection biases of X-ray bright AGN and how to disentangle the stellar and AGN contributions to the observed optical emission of z>1 objects. This work has implications for simulations of galaxy formation as well, as it addresses the mechanisms of AGN feedback that are likely at play through the observed relationship between AGN activity and star formation. Woot for being last author on a project I worked on 4 years ago!

Comment on A Topological Extension of General Relativity [Cross-Listing] by ChengyuanLee

ChengyuanLee — Wed, 18 Apr 2012 04:17:26 +0000

ChengyuanLee :
ChengyuanLee : COSMOLOGY
+1

Comment on A Topological Extension of General Relativity [Cross-Listing] by ChengyuanLee

ChengyuanLee — Wed, 18 Apr 2012 04:16:42 +0000

ChengyuanLee : COSMOLOGY

Comment on A Topological Extension of General Relativity [Cross-Listing] by ChengyuanLee

ChengyuanLee — Wed, 18 Apr 2012 04:16:04 +0000

COSMOLOGY

Comment on Friedmann Cosmology and Almost Isotropy [Replacement] by ChengyuanLi

ChengyuanLi — Fri, 13 Apr 2012 09:16:47 +0000

Type your comment here

ChengyuanLi : WEAK LENSING LENSING

Comment on Friedmann Cosmology and Almost Isotropy [Replacement] by ChengyuanLi

ChengyuanLi — Fri, 13 Apr 2012 09:16:29 +0000

LENSING

Comment on Friedmann Cosmology and Almost Isotropy [Replacement] by ChengyuanLi

ChengyuanLi — Fri, 13 Apr 2012 04:35:36 +0000

COSMOLOGY

Comment on Constraints on Cosmological Parameters from Strong Gravitational Lensing by Galaxy Clusters by Anais Rassat

Anais Rassat — Wed, 04 Apr 2012 13:13:12 +0000

Sorry, I won’t be here on Thursday to discuss this paper.

Comment on The Halo Occupation Distribution of SDSS Quasars by Reiko

Reiko — Tue, 27 Mar 2012 09:33:44 +0000

Cris will talk about this one.

Comment on Dependence of Quenching of Central and Satellite Galaxies at z=0 and z=1 on Halo Mass and Distance from its Centre by steaua

steaua — Tue, 13 Mar 2012 10:57:40 +0000

Comparison between Figs. 7a and 8a in this paper, with Fig. 8 in Peng et al. (2011) indicates the possibility that a casual link between quenching and halo mass would be not at all needed.

Comment on Cosmological particle creation in the lab? http://arxiv.org/abs/1203.1173 by deirdre

deirdre — Wed, 07 Mar 2012 02:08:04 +0000

Fun paper by Bill Unruh

Comment on Blue Stragglers After the Main Sequence by aranha

aranha — Fri, 02 Mar 2012 19:11:11 +0000

Cool!

Comment on Constraints on the low-mass end of the mass-metallicity relation at z=1-2 from lensed galaxies by steaua

steaua — Fri, 24 Feb 2012 10:08:56 +0000

Deriving metallicities from [NII]/Halpha is not so reliable, because of the dependence on the ionization parameter, see Fig. 7 in Kewley & Dopita 2002, ApJSS, 142, 35

Comment on The physics of the fundamental metallicity relation by steaua

steaua — Thu, 23 Feb 2012 10:45:26 +0000

Does the model reproduce the tightness of the (main sequence) SFR – mass relation?

Comment on Carbon Detection in Early-Time Optical Spectra of Type Ia Supernovae by James Guillochon

James Guillochon — Wed, 22 Feb 2012 08:54:41 +0000

Going to probably miss coffee tomorrow, feel free to skip the ones I voted for.

Comment on New remarks on the Cosmological Argument [Cross-Listing] by Schroeder

Schroeder — Wed, 22 Feb 2012 00:46:59 +0000

The authors of this paper do not take issue with the logic of the argument, but rather with the interpretation. To that end, the authors could have written, “The cosmological argument fails for the same reason that the following syllogism fails:

1) Nothing is better than a feast shared with friends.
2) Breadcrumbs are better than nothing
3) Therefore breadcrumbs are better than a feast shared with friends.”

and left it at that.

Paying this much attention to these claims and putting rejoinders on arxiv is just overindulgent. We don’t pour over Newton’s religious writings to see what kind of insights they may or may not offer to modern cosmology, so why waste our time with Aquinas? We don’t consider the claims of astrologers who deign to argue there is some profound truth in the random patterns of naked-eye visible objects, so why pander to a noisemaker like William Lane Craig who has an equivalent amount of intellectual heft and scientific data backing up his convictions?

Comment on New remarks on the Cosmological Argument [Cross-Listing] by Skielboe A.

Skielboe A. — Tue, 21 Feb 2012 09:22:56 +0000

I think its fair to make a logical counter argument, but I too doubt that it will change ideologies much..

Comment on New remarks on the Cosmological Argument [Cross-Listing] by Schroeder

Schroeder — Mon, 20 Feb 2012 19:04:07 +0000

There comes a point at which one shouldn’t argue with ideologues. In internet speak, this is called the principle of “Don’t Feed The Trolls”.

Comment on A large, multi-epoch H{\alpha} survey at z=2.23, 1.47, 0.84 & 0.40: the 11 Gyr evolution of star-forming galaxies from HiZELS by steaua

steaua — Fri, 17 Feb 2012 10:38:15 +0000

At higher redshift: The removal of the contamination of the [NII] line on the Halpha detection in the narrow-band filter, and the removal of the (Type-2) AGN contribution requires near-infrared spectroscopy on larger samples of galaxies.

Comment on The Habitable Zone Gallery by James Guillochon

James Guillochon — Tue, 14 Feb 2012 16:25:16 +0000

I’m probably not going to make it to coffee on time, feel free to skip over if I’m not around.

Comment on Discovery & Depth by Reiko

Reiko — Tue, 14 Feb 2012 16:19:54 +0000

A nice short report on what S. Kulkarni thinks is the “next big thing” in Astronomy the next 10 years.

Comment on Extreme Coronal Line Emitters: Tidal Disruption of Stars by Massive Black Holes in Galactic Nuclei? [Replacement] by Schroeder

Schroeder — Wed, 08 Feb 2012 18:12:45 +0000

Jules Halpern requested that people consider voting for this paper.

Comment on What Sets the Initial Rotation Rates of Massive Stars? by Anna

Anna — Wed, 01 Feb 2012 02:29:06 +0000

I can discuss this at ~10:45 am at coffee.

See you there!

-Anna

Comment on Magnetically-levitating disks around supermassive black holes [Replacement] by Dave

Dave — Fri, 27 Jan 2012 05:08:57 +0000

It’s a replacement, but was originally posted only this past Monday.

Comment on A Circumbinary Planet in Orbit Around the Short-Period White-Dwarf Eclipsing Binary RR Cae by Schroeder

Schroeder — Wed, 25 Jan 2012 21:08:04 +0000

The dismissal of the so-called “Applegate mechanism” is of interest here (c.f. Applegate 1992). Typically the argument is made, and repeated in this paper, that fully-convective low-mass companions cannot yield a gravitational quadrupole moment large enough to account for the orbital modulation. This is argued quite extensively in, for example, Brinkworth et al. 2006. However, in so-called Black Widow pulsar systems, Applegate & Shaham 1994 showed that tidal dissipation can supply the energy. The authors acknowledge that there is substantial tidal distortion of the secondary in all of these close-binary systems, but either I missed where the authors show the energetics are too small to allow for the Applegate mechanism or this theory is left unaddressed.

Comment on What Sets the Initial Rotation Rates of Massive Stars? by Anna

Anna — Tue, 24 Jan 2012 16:37:08 +0000

I will not be at coffee this week but I can discuss this paper on Friday 2/3. Sorry for the delay!

Comment on The Evolution of Stellar Velocity Dispersion During Dissipationless Galaxy Mergers by Nathan Goldbaum

Nathan Goldbaum — Tue, 24 Jan 2012 13:28:29 +0000

I will not be at coffee to discuss this paper.

Comment on Origin of the 12um Emission Across Galaxy Populations from WISE and SDSS Surveys by sloth

sloth — Thu, 19 Jan 2012 15:52:25 +0000

This is not a judgement of quality; there are other papers in the queue I would rather discuss.

Comment on Red sequence modal colour gradients across intermediate X-ray luminosity galaxy clusters by milvang

milvang — Wed, 18 Jan 2012 14:20:42 +0000

Interesting to see a paper on astro-ph being marked “Do Not Distribute” :-)

Comment on Information escaping the correlation hierarchy of the convergence field in the study of cosmological parameters by Reiko

Reiko — Thu, 12 Jan 2012 09:40:55 +0000

Cris might talk about this one.

Comment on On the inadequacy of N-point correlation functions to describe nonlinear cosmological fields: explicit examples and connection to simulations by Reiko

Reiko — Thu, 12 Jan 2012 09:40:10 +0000

Cris will talk about this one.

Comment on The Myth of the Molecular Ring by Nathan Goldbaum

Nathan Goldbaum — Wed, 11 Jan 2012 04:00:35 +0000

Comment on Evidence for extended gamma-ray emission from galaxy clusters by Tesla

Tesla — Fri, 06 Jan 2012 18:45:24 +0000

I think this paper should be discussed, but I would like read it carefully first. Perhaps I can talk about it Tuesday or Thursday next week.

Comment on A gas cloud on its way towards the super-massive black hole in the Galactic Centre by mstalevski

mstalevski — Thu, 15 Dec 2011 17:16:35 +0000

http://www.youtube.com/watch?v=ciWGrZMkXVM

Comment on Results of CERN Seminar: Hints of the Higgs by mstalevski

mstalevski — Tue, 13 Dec 2011 18:05:36 +0000

http://www.newscientist.com/article/dn21279-lhc-sees-hint-of-lightweight-higgs-boson.html?full=true

Comment on COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses X. Modeling based on high-precision astrometry of a sample of 25 lensed quasars: consequences for ellipticity, shear, and astrometric anomalies by Reiko

Reiko — Sat, 10 Dec 2011 04:50:10 +0000

Dominique can talk about this one!

Comment on Fables of reconstruction: controlling bias in the dark energy equation of state by saurabh

saurabh — Fri, 09 Dec 2011 07:05:08 +0000

What an awesome title!

Comment on Two ten-billion-solar-mass black holes at the centres of giant elliptical galaxies by Brad

Brad — Wed, 07 Dec 2011 18:01:08 +0000

Two related papers.

The Masses of Nuclear Black Holes in Luminous Elliptical Galaxies and Implications for the Space Density of the Most Massive Black Holes
http://adsabs.harvard.edu/abs/2007ApJ…662..808L

Is there an upper limit to black hole masses?
http://adsabs.harvard.edu/abs/2009MNRAS.393..838N

Comment on OJ 287 binary black hole system by Reiko

Reiko — Wed, 07 Dec 2011 17:37:44 +0000

This one is fun just to show the quasar lightcurve from 1891! Quasar lightcurves are generally erratic, but the recent outburst in 2005 was predicted, based on the GR precession in the binary BH system.

Comment on Two ten-billion-solar-mass black holes at the centres of giant elliptical galaxies by Reiko

Reiko — Wed, 07 Dec 2011 17:07:51 +0000

It would be interesting to read this paper and explain how the BH mass is estimated, since they mention deviation from the linear sigma-M relation.

Comment on The Aquila comparison Project: The Effects of Feedback and Numerical Methods on Simulations of Galaxy Formation by dandan

dandan — Wed, 07 Dec 2011 14:59:18 +0000

“large code-to-code variations … due mainly to the different implementations of feedback”
“more gas seems able to cool and become available for star formation in grid-based codes than in SPH”
“We conclude that state-of-the-art simulations cannot yet uniquely predict the properties of the baryonic component of a galaxy”

“Developing feedback algorithms that can effectively regulate the mass of a galaxy without hindering the formation of high-angular momentum stellar disks remains a challenge”

Comment on YouASTRO: a web-based bibliography management system with distributed comments and rating features for SAO/NASA ADS papers by kcooksey

kcooksey — Mon, 05 Dec 2011 14:34:21 +0000

It seems that this system would benefit from an e.g. \badcitet{} LaTeX command so that number of citations can be broken down by favorable, neutral, and unfavorable metrics.

Comment on A Compressed Sensing Approach to 3D Weak Lensing by Reiko

Reiko — Wed, 30 Nov 2011 14:48:25 +0000

Philipp will talk about this one.

Comment on Searching for hidden mirror symmetries in CMB fluctuations from WMAP 7 year maps by gstarkman

gstarkman — Thu, 24 Nov 2011 22:22:36 +0000

This seems like an interesting addition to the set of anomalies that have been detected in the WMAP maps of the CMB. I do think that the connection to earlier results needs to be made more clear. For example, the plane identified as a symmetry plane, which the authors says has a normal parallel to the dipole, is clear the same plane identified in the past by Copi, Huterer, Schwarz and Starkman (arXiv:astro-ph/0403353) using multipole vector analysis as the shared plane of the quadrupole and octopole which they showed to have a normal aligned with the dipole). Because they are both equivalent, the normal to that plane is therefore the same as the direction that maximizes the angular momentum dispersion of the quadrupole and octopole (as identified prior to Copi et al by de Oliveira et al astro-ph/0307282),
and identical to the so-called “axis of evil” identified later by Land and Magueijo.

Comment on One Gravitational Potential or Two? Forecasts and Tests by Reiko

Reiko — Tue, 22 Nov 2011 08:22:54 +0000

Someone should read and present this short paper!

Comment on The Large, Oxygen-Rich Halos of Star-Forming Galaxies Are A Major Reservoir of Galactic Metals by Reiko

Reiko — Fri, 18 Nov 2011 07:57:35 +0000

Useful to know if one wants to run cosmological simulation of galaxy evolutions that includes gas.

Comment on Astrology beliefs among undergraduate students by Roberto M

Roberto M — Thu, 17 Nov 2011 20:10:19 +0000

Let’s invite Salfate and Yolanda to next astro-ph discussion

Comment on The Milky Way’s bright satellites as an apparent failure of LCDM by dandan

dandan — Thu, 17 Nov 2011 17:02:30 +0000

Reiko, can we also discuss about this paper? :) How are you going to notice my vote on this paper for next Thursday??

Comment on Weak lensing by triaxial galaxy clusters [Replacement] by Reiko

Reiko — Wed, 16 Nov 2011 15:34:44 +0000

Zahra voted for this one.

Comment on Measuring the Geometry of the Universe from Weak Gravitational Lensing behind Galaxy Groups in the HST COSMOS survey by reiko

reiko — Wed, 16 Nov 2011 07:13:53 +0000

Geometric tests using WL.

Comment on An Excursion-Set Model for the Structure of GMCs and the ISM by reiko

reiko — Tue, 15 Nov 2011 07:31:02 +0000

I think this is important for the simulation group working on SAM (semi-analytic models).

Comment on Magnificent Magnification: Exploiting the Other Half of the Lensing Signal by reiko

reiko — Mon, 14 Nov 2011 19:00:02 +0000

I’m going to talk about a strong lensing magnification signal, detected in SDSS, using a “photometric Fundamental Plane” method.

Comment on Andrea Ghez Colloquium Club by James Guillochon

James Guillochon — Mon, 14 Nov 2011 08:28:45 +0000

We will probably focus mostly on Ghez 2008 and Do 2009 and skip Lu 2009. I'll also talk a bit about Weinberg 2005 (http://adsabs.harvard.edu/abs/2005ApJ...622..878W).

Comment on Evidence for Type Ia Supernova Diversity from Ultraviolet Observations with the Hubble Space Telescope by durant

durant — Thu, 03 Nov 2011 17:32:22 +0000

Please discuss without me. I am interested to know: can this really challenge the place of SN1a in establishing Lambda? The last paragraph suggests so, without any quantification or statement of whether there would be more acceleration or less.

Comment on Identifying Non-Resonant Kepler Planetary Systems by Robert M

Robert M — Thu, 03 Nov 2011 17:21:30 +0000

Eric, Would you like to talk about this on wednesday?

Comment on Planetary Nebulae Detected in the Spitzer Space Telescope GLIMPSE 3D Legacy Survey by Denise R Goncalves

Denise R Goncalves — Thu, 03 Nov 2011 12:49:26 +0000

Vou começar a lê-lo agora, ou seja, certamente só poderei discutí-lo na semana que vem :( Mas caso alguém se prontifique será GENIAL!

Comment on Conceptual Problems in Cosmology [Cross-Listing] by skielboe

skielboe — Tue, 01 Nov 2011 15:36:20 +0000

Who’s Walter?

Comment on 55 Cancri: A Coplanar Planetary System that is Likely Misaligned with its Star by Robert M

Robert M — Mon, 31 Oct 2011 19:41:39 +0000

Probably best for Wednesday, I would think.

Comment on 55 Cancri: A Coplanar Planetary System that is Likely Misaligned with its Star by benelson

benelson — Mon, 31 Oct 2011 19:39:41 +0000

Registered. I’m glad we’re using this now. Talk about it tomorrow or Wednesday?

Comment on Detection Technique for Artificially-Illuminated Objects in the Outer Solar System and Beyond by Robert M

Robert M — Mon, 31 Oct 2011 17:55:53 +0000

For Tuesday. There are a couple of fun things in here.

Comment on Lack of Inflated Radii for Kepler Giant Planet Candidates Receiving Modest Stellar Irradiation by Robert M

Robert M — Mon, 31 Oct 2011 17:43:49 +0000

For Planet-PH on Wednesday

Comment on 55 Cancri: A Coplanar Planetary System that is Likely Misaligned with its Star by Robert M

Robert M — Fri, 28 Oct 2011 23:33:17 +0000

Ben is not on here yet. :)

Comment on 55 Cancri: A Coplanar Planetary System that is Likely Misaligned with its Star by eford

eford — Fri, 28 Oct 2011 22:29:55 +0000

Ben, would you summarize this paper for us?

Comment on 55 Cancri: A Coplanar Planetary System that is Likely Misaligned with its Star by Robert_Morehead

Robert_Morehead — Fri, 28 Oct 2011 19:20:16 +0000

This is a paper. Well this is a comment on a paper.

Comment on The Structure of the Interstellar Medium of Star Forming Galaxies by Sijing Shen

Sijing Shen — Tue, 25 Oct 2011 00:00:39 +0000

I’d like to discuss it in the Journal club on Thursday..

Comment on On the Nature of the Progenitor of the Type Ia SN2011fe in M101 by Denise R Goncalves

Denise R Goncalves — Thu, 20 Oct 2011 12:54:56 +0000

Type your comment here

Comment on A High Resolution Study of the HI-H2 Transition across the Perseus Molecular Cloud by Nathan Goldbaum

Nathan Goldbaum — Thu, 13 Oct 2011 01:13:11 +0000

I will not be at coffee to discuss this on Friday.

Comment on The Formation of Binaries by Chuanwu Liu

Chuanwu Liu — Mon, 26 Sep 2011 08:23:13 +0000

interesting

Comment on On the Origin of Stellar Masses by manferna

manferna — Thu, 15 Sep 2011 21:45:49 +0000

I’m sorry it is another 2011 paper from Krumholz which will be presented by Rui

Comment on On the Origin of Stellar Masses by manferna

manferna — Thu, 15 Sep 2011 21:41:36 +0000

manferna : This paper will be presented by Rui next Thursday

manferna :

Type your comment here

Comment on The Sagittarius impact as an architect of spirality and outer rings in the Milky Way by cpurcell

cpurcell — Thu, 15 Sep 2011 18:01:52 +0000

You can see some unpublished images/movies of our simulations at http://www.chrispurcell.org/workshop/sgr.html

Comment on On the Origin of Stellar Masses by manferna

manferna — Thu, 15 Sep 2011 14:46:24 +0000

This paper will be presented by Rui next Thursday

Comment on Low temperature FIR and submm mass absorption coefficient of interstellar silicate dust analogues by manferna

manferna — Thu, 15 Sep 2011 14:43:29 +0000

Updating dust opacity for mass estimations?

Comment on Millimeter multiplicity in DR21(OH): outflows, molecular cores and envelopes by manferna

manferna — Thu, 15 Sep 2011 14:28:21 +0000

This is a hello world message

Comment on Early radio and X-ray observations of the youngest nearby type Ia supernova PTF11kly (SN 2011fe) by James Guillochon

James Guillochon — Thu, 15 Sep 2011 03:03:38 +0000

I will not be around tomorrow to discuss.

Comment on Herschel/HerMES: The X-ray – Infrared correlation for star-forming galaxies at z~1 by pkurczynski

pkurczynski — Mon, 12 Sep 2011 14:18:13 +0000

luminosity dependence of the LX/LIR ratio might explain the evident discrepancy between SFR(Persic) and SFR(Lehmer) with SFR(Ranalli) and SFR(IR) when applied to 1

Comment on Stellar population models at high spectral resolution by Bengt Edvardsson

Bengt Edvardsson — Fri, 09 Sep 2011 06:58:51 +0000

A word of caution concerning the presently available fluxes of the MARCS library: These are not synthetic spectra, but unresolved sampled fluxes giving only a statistical measure of the integrated flux in a particular wavelength interval. No information is contained concerning the fluxes between the sampled wavelength points (R=20000). See Plez, B. 2008, Physica Scripta T133, 0140003.

Comment on Type Ia SN Discovered in M101 by Schroeder

Schroeder — Mon, 29 Aug 2011 20:55:47 +0000

Navigate the ATEL jungle:

Comment on Agenda by HK

HK — Fri, 19 Aug 2011 21:25:34 +0000

The paper I’ll lead is a 72-pg long. I won’t be able to cover every detail of it but I’ll try to give you a good summary and its punch line…

Hwi

Comment on Critical Star-Formation Rates for Reionization: Full Reionization occurs at z = 3 by Michael Drinkwater

Michael Drinkwater — Thu, 18 Aug 2011 22:18:12 +0000

That’s funny; I picked this paper as it looked controversial and interesting with the z=3 claim. :)

Comment on Critical Star-Formation Rates for Reionization: Full Reionization occurs at z = 3 by ryano

ryano — Thu, 18 Aug 2011 02:59:10 +0000

There is a typo in the arxiv abs title: z ~ 7 not 3.

Comment on Supermassive Black Hole Growth in Starburst Galaxies over Cosmic Time: Constraints from the Deepest Chandra Fields by James Guillochon

James Guillochon — Wed, 17 Aug 2011 01:28:49 +0000

I won’t be around to discuss this, but this provides a nice complement/counter-point to yesterday’s AGN paper:

http://voxcharta.org/2011/08/15/galaxy-pairs-in-the-sloan-digital-sky-survey-iv-interactions-trigger-agn/

Comment on Magnetohydrodynamics on an unstructured moving grid by James Guillochon

James Guillochon — Wed, 10 Aug 2011 17:23:25 +0000

I have a meeting, so I won’t be able to go to coffee this morning. This also means someone else will need to bring a laptop to drive the projector. Sorry for the late notice!

Comment on Swift J2058.4+0516: Discovery of a Possible Second Relativistic Tidal Disruption Flare by nino

nino — Thu, 28 Jul 2011 17:32:01 +0000

Also compare to this by Levan et al. : http://arxiv.org/abs/1104.3356

Comment on A relativistic jetted outburst from a massive black hole fed by a tidally disrupted star by nino

nino — Thu, 28 Jul 2011 17:31:26 +0000

Also the data paper by Levan et al. : http://arxiv.org/abs/1104.3356

Comment on Swift J2058.4+0516: Discovery of a Possible Second Relativistic Tidal Disruption Flare by James Guillochon

James Guillochon — Thu, 28 Jul 2011 16:47:51 +0000

Compare to:
http://voxcharta.org/2011/04/18/a-relativistic-jetted-outburst-from-a-massive-black-hole-fed-by-a-tidally-disrupted-star/

Comment on Too small to succeed? Lighting up massive dark matter subhaloes of the Milky Way by Val

Val — Wed, 27 Jul 2011 17:25:04 +0000

http://onlinelibrary.wiley.com/doi/10.1111/j.1745-3933.2011.01074.x/pdf

Comment on Life might be rare despite its early emergence on Earth: a Bayesian analysis of the probability of abiogenesis by ecameron

ecameron — Thu, 21 Jul 2011 06:16:08 +0000

Hanson (1998)

Comment on Expansion of the Youngest Galactic Supernova Remnant G1.9+0.3 by Laura Lopez

Laura Lopez — Thu, 23 Jun 2011 16:07:20 +0000

I’m in Boston right now so won’t be there to discuss this paper at coffee!

Comment on The Spectroscopic Classification and Explosion Properties of SN2009nz Associated with GRB091127 at z=0.490 by Johan

Johan — Fri, 17 Jun 2011 06:05:07 +0000

I hate the style of these guys. They cannot present a result without stepping on other people in the most unjustified manner.

Comment on Observational selection effects and the M-sigma relation by James Guillochon

James Guillochon — Tue, 07 Jun 2011 06:53:01 +0000

Comment on The Formation of Kiloparsec-Scale HI Holes in Dwarf Galaxies by westmoquette

westmoquette — Tue, 31 May 2011 14:50:52 +0000

Related paper http://arxiv.org/abs/0808.0193

Comment on A quasi-radial stability criterion for rotating relativistic stars by friedman

friedman — Mon, 30 May 2011 16:40:15 +0000

This is an important change in our understanding of the turning-point criterion for instability.

Comment on Filamentary Infall of Cold Gas and Escape of Lyman Alpha and Hydrogen Ionizing Radiation from an Interacting High-Redshift Galaxy by Gabor

Gabor — Thu, 26 May 2011 17:24:07 +0000

We might discuss this paper in more detail during Journal Club next week.

Comment on Quantifying the rareness of extreme galaxy clusters by jen

jen — Wed, 25 May 2011 19:30:14 +0000

Although I haven’t read it yet, the topic of this paper reminded me of some of the extreme cluster likelihood discussions we had in prior journal clubs. Too bad Ravi Sheth isn’t around to comment on it!

Comment on Secular theory of the orbital evolution of the young stellar disc in the Galactic Centre by rja1220

rja1220 — Wed, 25 May 2011 17:35:37 +0000

Cool, but to much detail for a j-club meeting

Comment on Colloquium Club 5/24/2011 by James Guillochon

James Guillochon — Tue, 24 May 2011 17:40:28 +0000

Useful reference on pulsars:
http://www.cv.nrao.edu/course/astr534/Pulsars.html

Parkes telescope images:
http://www.google.com/search?q=parkes%20telescope&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&hl=en&tab=wi&biw=1024&bih=1083

Comment on Hierarchical formation of bulgeless galaxies II: Redistribution of angular momentum via galactic fountains by Sijing Shen

Sijing Shen — Tue, 17 May 2011 00:56:03 +0000

I’ll discuss about it on the journal club on Thursday.

Comment on GRB 110328A/Swift J164449.3+573451: The Tidal Obliteration of a Deeply Plunging Star? by James Guillochon

James Guillochon — Mon, 16 May 2011 02:50:36 +0000

I think I won’t be around for Tuesday’s discussion, so I will discuss this on Wednesday.

Comment on The Circular Polarization of Sagittarius A* at Submillimeter Wavelengths by jteske

jteske — Wed, 04 May 2011 03:15:26 +0000

Talk on Friday from co-author?

Comment on Fix the PhD by Ciska Kemper

Ciska Kemper — Wed, 27 Apr 2011 03:24:29 +0000

This is also being discussed over at Astrobetter.com: http://www.astrobetter.com/nature-on-phd-overproduction/
I am particularly intrigued by the comments from Guille there, who writes: “Call me radical, but I think this is a perversion of the system. Highly trained researchers in tenure track or faculty positions should be the ones doing the actual science. Given the already saturated pool of postdoctoral researchers bouncing from one temporary position to another, I really think the funding agencies should promptly rethink the whole funding system (eg. strongly limiting the institutional overheads and give more weight to the actual commitment of the PI to the actual work to be done) … just a thought.”

Comment on The debris disk – terrestrial planet connection by jteske

jteske — Thu, 21 Apr 2011 18:31:34 +0000

Answer: This is just the conference proceeding/condensed version of what Phil presented at JC this week. So boo. ;)

Comment on The debris disk – terrestrial planet connection by jteske

jteske — Thu, 21 Apr 2011 18:30:13 +0000

How is this different that the paper Phil presented at JC this week (http://arxiv.org/abs/1104.0007v1)?

Comment on Journal club, Apr 21 2011 by James Guillochon

James Guillochon — Thu, 21 Apr 2011 06:45:05 +0000

Updated the link so it points directly to the VC posting.

Comment on Thermochemistry and Photochemistry in Cooler Hydrogen Dominated Extrasolar Planets: The Case of GJ436b by jteske

jteske — Thu, 21 Apr 2011 01:31:53 +0000

Oops, I mean Friday. :)

Comment on Thermochemistry and Photochemistry in Cooler Hydrogen Dominated Extrasolar Planets: The Case of GJ436b by jteske

jteske — Thu, 21 Apr 2011 01:31:21 +0000

I will try to talk about this tomorrow!

Comment on The Star Formation Rate-Density Relation at 0.6
Niraj — Tue, 19 Apr 2011 09:37:20 +0000

http://arxiv.org/abs/astro-ph/0703653

Comment on Modelling the reflective thermal contribution to the acceleration of the Pioneer spacecraft by iparrish

iparrish — Mon, 18 Apr 2011 21:55:14 +0000

There’s some nice context for this paper in this Discovery article:
http://news.discovery.com/space/oh-pioneer-mysterious-anomaly-may-finally-be-solved-110414.html

Comment on Progressively more prolate dark matter halo in the outer Galaxy as traced by flaring HI gas by Christine

Christine — Fri, 01 Apr 2011 20:31:46 +0000

Hey all,

There’s a lull in my coding group. Have you discussed this yet?

Christine

Comment on Modelling the reflective thermal contribution to the acceleration of the Pioneer spacecraft by James Guillochon

James Guillochon — Fri, 01 Apr 2011 17:02:54 +0000

I cleaned this post up a bit so it doesn’t occupy so much space. Soon I’m going to add to option to add non-astro-ph postings by arxiv number, and the formatting will be more automatic.

Comment on Shock formation in stellar perturbations and tidal shock waves in binaries by James Guillochon

James Guillochon — Mon, 28 Mar 2011 07:51:32 +0000

Perhaps useful:
http://www.aerojockey.com/papers/hodograph/node3.html

Comment on Times, environments and channels of bulge formation in a LambdaCDM cosmology by egpbos

egpbos — Thu, 17 Feb 2011 09:08:58 +0000

I do wonder whether posting multiple papers at the same time like this is always a good idea. On the one hand, in an ideal world, the content should speak for itself and you should not let yourself be influenced by things like this. On the other hand, it does raise the impression that it may have been done to attract more attention and thus more citations, which for me would actually be a reason to read the paper more critically or maybe not read it at all. Of course there may be other very valid reasons to publish complementary papers at the same time (quite exactly the same time in this case, judging by the fact that they’re only two spots apart in the list). Maybe I’m just being a little paranoid. Still, I wonder what others think about these kinds of publishing strategies.

Comment on Cosmological simulations of the formation of the stellar haloes around disc galaxies by egpbos

egpbos — Tue, 15 Feb 2011 08:20:36 +0000

When skimming over it, at first I read “cosmological simulations of the formation of stars”, so I immediately started reading… Still an interesting paper though ;)

Comment on Annual Parallax Measurements of an Infrared Dark Cloud MSXDC G034.43+00.24 with VERA by Adam Ginsburg

Adam Ginsburg — Fri, 11 Feb 2011 17:19:15 +0000

Is the whole G34 complex 2x closer than we thought? G34.26+0.15 is one of the brightest mm and cm sources in the plane. If it’s really moving at 40 km/s with respect to the local circular velocity, what’s going on?

Comment on The Steppenwolf: A proposal for a habitable planet in interstellar space by mikhailway

mikhailway — Thu, 10 Feb 2011 19:32:34 +0000

Made it onto Wired.com today:
http://www.wired.com/wiredscience/2011/02/steppenwolf-planet

Comment on Ancient giants: on the farthest galaxy at z=8.6 by szibetti

szibetti — Thu, 10 Feb 2011 10:39:37 +0000

Interesting (?) approach: use cosmological models to constrain missing or uncertain observations, not the other way around. Worth a discussion.

Comment on The Steppenwolf: A proposal for a habitable planet in interstellar space by James Guillochon

James Guillochon — Tue, 08 Feb 2011 18:16:52 +0000

Won’t be able to make it to coffee on time today.

Comment on Solar wind origin of terrestrial water by Schroeder

Schroeder — Fri, 04 Feb 2011 17:28:02 +0000

In retaliation for andrews’ thumbs-down!

Comment on Radiation-magnetohydrodynamic simulations of HII regions and their associated PDRs in turbulent molecular clouds by Adam Ginsburg

Adam Ginsburg — Mon, 31 Jan 2011 20:25:18 +0000

Awesome simulated images.

Comment on Supermassive black holes do not correlate with galaxy disks or pseudobulges by lidia

lidia — Wed, 26 Jan 2011 14:35:35 +0000

discussed by lidia

Comment on Viva Panspermia! by Schroeder

Schroeder — Tue, 25 Jan 2011 22:20:52 +0000

This argument suffers from many of the same problems as the recently published studies reporting to validate the existence of ESP. That freeze-dried bacteria have similar spectral features to molecular clouds in the ISM is not surprising, but nearly anybody can come up with more plausible explanations than the claim that the molecular cloud is made of freeze-dried bacteria. Additionally, the na$\”{i}$ve appeal to probabilities of the survival of bacteria in molecular clouds relies on a whole-cloth invention of numbers. It’s aggravating that arxiv listed this as it was so un-worthy of reading. That Observatory Magazine is publishing it is worth a canceled subscription or at least relabeling the genre as “science fiction”.

Comment on A New Equation of State for Astrophysical Simulations by James Guillochon

James Guillochon — Fri, 21 Jan 2011 04:20:22 +0000

I won’t be able to make it in tomorrow, so I’ll bump some of my votes to next week.

Comment on CU Boulder Announcements by bnhan

bnhan — Mon, 17 Jan 2011 05:17:57 +0000

Hi Gins, are we getting the club rolling this week?

Comment on Sub-millimetre galaxies reside in dark matter halos with masses greater than 3×10^11 solar masses by Nathan Goldbaum

Nathan Goldbaum — Fri, 07 Jan 2011 06:46:47 +0000

The GOODS-N field:
http://sci.esa.int/science-e-media/img/7e/GOODS-N_Herschel-SPIRE.jpg

The Lockman Hole field:
http://herschel.cf.ac.uk/files/Lockman-SWIRE_hi.jpg

Comment on Influence of the Environment on PAH Emission in Star-Forming Regions by Laura Lopez

Laura Lopez — Thu, 09 Dec 2010 03:10:42 +0000

I will be traveling on Friday, so I won’t be at coffee to discuss this paper…

Comment on Gamma-ray flares from the Crab Nebula by arons

arons — Tue, 07 Dec 2010 09:01:03 +0000

New probe of a galactic Pevatron

Comment on Dust Attenuation in UV-selected Starbursts at High Redshift and their Local Counterparts: Implications for the Cosmic Star Formation Rate Density by alpaca

alpaca — Mon, 06 Dec 2010 09:31:03 +0000

presented by:
alpaca

Comment on Rapid cooling of Cas A (1011.6142) by atish

atish — Thu, 02 Dec 2010 16:36:35 +0000

Another related paper appeared today (02 Dec 2010) : arXiv:1012.0045 (Shternin et al.)

Comment on Rapid cooling of Cas A (1011.6142) by James Guillochon

James Guillochon — Thu, 02 Dec 2010 13:57:40 +0000

FYI, this is actually up on today’s listing:

http://voxcharta.org/2010/11/29/rapid-cooling-of-the-neutron-star-in-cassiopeia-a-triggered-by-neutron-superfluidity-in-dense-matter/

There’s a period of ~5-10 minutes while the website loads the days postings for which the entire listing may not be visible, it is possible that is what occurred in this instance.

Comment on CU Boulder Announcements by Adam Ginsburg

Adam Ginsburg — Mon, 29 Nov 2010 17:09:39 +0000

Since there are only 2 weeks left in the semester, let’s delay the JC until next semester.

Comment on Fragmentation of general relativistic quasi-toroidal polytropes [Cross-Listing] by oshaughn

oshaughn — Tue, 23 Nov 2010 02:11:16 +0000

Comment on The metallicity of the long GRB hosts and the Fundamental Metallicity Relation of low-mass galaxies by dawn

dawn — Mon, 22 Nov 2010 15:44:55 +0000

See also http://arxiv.org/abs/1011.4060v1, from last week and about the same thing.

Comment on Colloquium Club 11/22/2010 by James Guillochon

James Guillochon — Mon, 22 Nov 2010 01:22:39 +0000

Comment on CU Boulder Announcements by Adam Ginsburg

Adam Ginsburg — Thu, 18 Nov 2010 22:04:52 +0000

Let’s try Tuesday of next week, 9 am. I’ll send out an announcement sometime in the next day or two.

Comment on CU Boulder Announcements by bnhan

bnhan — Thu, 18 Nov 2010 17:16:30 +0000

Hi folks, are the meeting time and location finalized?

So are we starting after we get back from the break, or until next semester?

Thx,

Comment on CU Boulder Announcements by kwillett

kwillett — Tue, 16 Nov 2010 17:19:52 +0000

casa-jc hasn’t been used in a year or so; Mike Shull has been sending out announcements for his research group/journal club manually.

If we want to use casa-jc, you can subscribe using instructions here: http://www.colorado.edu/its/docs/email/lists/. Whoever is the list owner will have to approve you, although there’s no reason they shouldn’t.

Hopefully we can get physical discussions going soon, once Gins is back from traveling. Sounds like more people prefer early morning instead of afternoon?

$E=mc^2 M_\odot$

Comment on A Very Close Binary Black Hole in a Giant Elliptical Galaxy 3C 66B and its Black Hole Merger by oshaughn

oshaughn — Tue, 16 Nov 2010 13:34:02 +0000

I inserted this hoping we’d discuss pulsar timing: this source was already ruled out in http://adsabs.harvard.edu/abs/2004ApJ…606..799J
with (roughly) similar assumed masses.

Comment on A Very Close Binary Black Hole in a Giant Elliptical Galaxy 3C 66B and its Black Hole Merger by friedman

friedman — Sun, 14 Nov 2010 20:11:54 +0000

A decay time of 500 years seems to give a very low a priori
probability for a supermassive BBH system in a giant
elliptical that close to us:
z=.02, H=71 km/s/Mpc gives a distance of about 85 Mpc.

For BHs with masses this large you need a merger rate
less than 1 in 10^9 years or so to avoid giant ellipticals
with BH masses larger than 10^10 Msun.
Even at 1 merger in 10^8 yr, 10^8/500 > 10^5 galaxies
have to be monitored to see a merger like this.

With the closest giant elliptical in Virgo,
18 Mpc away, we shouldn’t
have more than a few hundred giant ellipticals this close.

(And if the category of monitored galaxies is broadened,
the mass of observed supermassive black holes smaller. )

Comment on CU Boulder Announcements by Adam Ginsburg

Adam Ginsburg — Fri, 12 Nov 2010 23:47:47 +0000

Nick – no idea; I’m not on the casa-jc list. At the moment, voxcharta is not sending e-mails.

Comment on CU Boulder Announcements by nnelson

nnelson — Fri, 05 Nov 2010 21:11:18 +0000

9 or 10 AM would also be preferable for me, but I realize attendance may be better in the afternoon. Might I suggest 4 PM so as to get it out of the middle of the afternoon?

Comment on CU Boulder Announcements by Cara Battersby

Cara Battersby — Fri, 05 Nov 2010 20:21:38 +0000

I would prefer mornings (9 or 10am?) with coffee, but afternoon is OK too.

Comment on CU Boulder Announcements by nnelson

nnelson — Fri, 05 Nov 2010 18:50:02 +0000

How does one in JILA get on the casa-jc mailing list?

Comment on CU Boulder Announcements by Ben Zeiger

Ben Zeiger — Fri, 05 Nov 2010 16:31:04 +0000

As a tasty alternative, there are two grills sitting outside the ARL conference room. All you have to do is bring the meat.

Comment on CU Boulder Announcements by bnhan

bnhan — Fri, 05 Nov 2010 14:45:03 +0000

yeah the location and time works alright with me!

Comment on A two-solar-mass neutron star measured using Shapiro delay by James Guillochon

James Guillochon — Fri, 29 Oct 2010 00:52:13 +0000

The astro-ph posting is up now too:

http://voxcharta.org/2010/10/28/shapiro-delay-measurement-of-a-two-solar-mass-neutron-star/

Comment on The kinematic identification of a thick stellar disc in M31 by Christine

Christine — Thu, 28 Oct 2010 23:37:50 +0000

I will read this paper for next week.

Comment on The clustering of massive galaxies at z~0.5 from the first semester of BOSS data by Sarah

Sarah — Tue, 26 Oct 2010 01:13:43 +0000

i’ll talk about this paper at journal club on thursday.

Comment on The X-ray spectral signatures from the complex circumnuclear regions in the Compton thick AGN NGC 424 by fcivano

fcivano — Thu, 21 Oct 2010 19:29:01 +0000

Andrea will attend the discussion tomorrow and summarize the results of this paper.

Comment on Explosions Triggered by Violent Binary-Star Collisions: Application to Eta Carinae and other Eruptive Transients by James Guillochon

James Guillochon — Wed, 20 Oct 2010 01:03:54 +0000

Closely related paper also posted today by the same author:

http://voxcharta.org/2010/10/19/a-revised-historical-light-curve-of-eta-carinae-and-the-timing-of-close-periastron-encounters/

Comment on A frozen super-Earth orbiting a star at the bottom of the Main Sequence by James Guillochon

James Guillochon — Wed, 29 Sep 2010 01:14:34 +0000

Getting pretty close to the habitable zone here…just a bit too cold.

EDIT: And by a bit, I mean a lot…down a factor of ten thousand in luminosity. Brrr.

Comment on Hawking radiation from ultrashort laser pulse filaments [Cross-Listing] by belinda

belinda — Fri, 24 Sep 2010 18:11:19 +0000

Have not read the paper (and would probably not understand it) but am fascinated by the idea that they may have actually generated and detected Hawking radiation.

Comment on Jet-Powered Molecular Hydrogen Emission from Radio Galaxies by belinda

belinda — Fri, 24 Sep 2010 18:09:04 +0000

This paper looks interesting. It shows significantly warmer molecular H in radio galaxies than in SF galaxies and suggests heating via jet feedback. Most of the sources show evidence of an AGN so are likely not pure SF galaxies.
Recent results have shown enrichment of material around the boundaries of bubbles, perhaps due to entrainment of material from the central regions. This seems rather to be heating of existing gas by the jet/outflowing material.

Comment on Transit timing variation and activity in the WASP-10 planetary system by Neil

Neil — Fri, 24 Sep 2010 17:33:07 +0000

similar to wasp3b paper

Comment on A Study of Halo Coronal Mass Ejections and Related Flare and Radio Burst Observations in Solar Cycle 23 by fcivano

fcivano — Fri, 24 Sep 2010 15:29:38 +0000

this paper is

Comment on The Spitzer c2d Survey of Weak-Line T Tauri Stars. III. The Transition from Primordial Disks to Debris Disks by fcivano

fcivano — Fri, 24 Sep 2010 15:05:17 +0000

I liked it a lot

Comment on The effects of fly-bys on planetary systems by sune

sune — Fri, 24 Sep 2010 06:29:45 +0000

boyaka boyaka

Comment on What do we know about gamma-gay bursts? by Laura Lopez

Laura Lopez — Fri, 24 Sep 2010 02:09:44 +0000

Quite the unfortunate typo.

Comment on Evolution of Spin Direction of Accreting Magnetic Protostars and Spin-Orbit Misalignment in Exoplanetary Systems: II. Warped Discs by Shangfei

Shangfei — Fri, 17 Sep 2010 03:52:57 +0000

Paper I is here: http://arxiv.org/abs/1008.3148

Comment on Formation of asteroid pairs by rotational fission by Shangfei

Shangfei — Thu, 16 Sep 2010 02:35:55 +0000

You can find this paper from http://162.105.156.114/nature.pdf

Comment on Observational Evidence from SDSS for a Merger Origin of the Milky Way’s Thick Disk by Judy

Judy — Fri, 10 Sep 2010 01:17:04 +0000

See also Sales et al. 2009 (http://adsabs.harvard.edu/abs/2009MNRAS.400L..61S)

Comment on On Deliberate Misreferencing as a Tool of Science Policy by Laura Lopez

Laura Lopez — Wed, 08 Sep 2010 04:25:11 +0000

The person who submitted this is Carl H. Gibson. If you look him up on ADS, he just completed two papers with N. Chandra Wickramasinghe, the second author on this 1986 document. Without knowing any of them, my theory would be that Carl just learned of this injustice and decided to make it public.

Comment on On Deliberate Misreferencing as a Tool of Science Policy by James Guillochon

James Guillochon — Wed, 08 Sep 2010 03:54:12 +0000

Someone was being cheeky, I think.

Comment on On Deliberate Misreferencing as a Tool of Science Policy by Nathan

Nathan — Wed, 08 Sep 2010 03:50:22 +0000

Does anyone know why this showed up on the arxiv today?

Comment on Single or Double Degenerate Progenitors? Searching for Shock Emission in the SDSS-II Type Ia Supernovae by James Guillochon

James Guillochon — Tue, 31 Aug 2010 15:18:32 +0000

The model used to calculate shock brightness is described in Kasen 2010:

http://adsabs.harvard.edu/abs/2010ApJ…708.1025K

Comment on Probing potassium in the atmosphere of HD 80606b with tunable filter transit spectrophotometry from the Gran Telescopio Canarias by jfortney

jfortney — Tue, 31 Aug 2010 04:13:05 +0000

Yes, I’ll be there. See also the “companion” paper of: http://arxiv.org/abs/1008.4795
There is a good story involved.

Comment on Probing potassium in the atmosphere of HD 80606b with tunable filter transit spectrophotometry from the Gran Telescopio Canarias by James Guillochon

James Guillochon — Tue, 31 Aug 2010 01:23:43 +0000

Jonathan has told me that he’ll be able to make it to coffee to discuss this paper.

Comment on Primordial planets, comets and moons foster life in the cosmos by Johan

Johan — Tue, 24 Aug 2010 07:06:42 +0000

far out man

Comment on Improved Limits on Spin-Dependent WIMP-Proton Interactions from a Two Liter CF$_3$I Bubble Chamber by mqk

mqk — Mon, 23 Aug 2010 19:16:41 +0000

From Fermilab/SLAC's Symmetry Breaking magazine: A sound clip of an alpha bubble in the COUPP experiment. A sound clip of a simulated WIMP bubble in the COUPP experiment.

Comment on The Properties of the Interstellar Medium within a Star-Forming Galaxy at z=2.3 by Nathan

Nathan — Mon, 23 Aug 2010 00:02:52 +0000

See the nature discovery paper on this object as well:
http://www.nature.com/nature/journal/v464/n7289/full/nature08880.html

Comment on An easy way to boost a paper’s citations by jens

jens — Wed, 18 Aug 2010 19:29:16 +0000

Or maybe not..:

http://scholarlykitchen.sspnet.org/2010/08/18/reference-list-length-and-citations-a-spurious-relationship/?utm_source=feedburner&utm_medium=twitter&utm_campaign=Feed%3A+ScholarlyKitchen+%28The+Scholarly+Kitchen%29

Comment on Recoiling Massive Black Holes in Gas-Rich Galaxy Mergers by Javiera

Javiera — Mon, 16 Aug 2010 16:44:01 +0000

I’ll discuss this paper on Tuesday!

Comment on On the fragmentation criteria of self-gravitating protoplanetary discs by Clément

Clément — Wed, 04 Aug 2010 05:37:55 +0000

Farzana Meru is currently visiting us for the ISIMA summer school. She will join us at coffee to talk about her paper!

Comment on Black hole-neutron star mergers: effects of the orientation of the black hole spin by James Guillochon

James Guillochon — Tue, 27 Jul 2010 04:26:26 +0000

Some movies:
http://www.black-holes.org/explore2.html

Comment on Aspherical Supernova Shock Breakout and the Observations of Supernova 2008D by James Guillochon

James Guillochon — Thu, 22 Jul 2010 09:50:29 +0000

Realized I will not be in tomorrow, I’ll revote for this paper on Friday.

Comment on On the mass-radius relation of hot stellar systems by loren

loren — Thu, 15 Jul 2010 08:07:55 +0000

looks very interesting!

Comment on New Fe II energy levels from stellar spectra by jlu

jlu — Tue, 13 Jul 2010 18:09:15 +0000

Would this help with UV colors as well?

Comment on Was the Progenitor of the Sagittarius Stream a Disc Galaxy? by Kevin Schlaufman

Kevin Schlaufman — Mon, 12 Jul 2010 17:28:10 +0000

http://www.ucolick.org/~kcs/research/SEGUE/sagittarius/f03.png

Comment on A newly discovered DLA and associated Ly-alpha emission in the spectra of the gravitationally lensed quasar UM 673A,B by Johan

Johan — Mon, 12 Jul 2010 06:42:41 +0000

1) As I understand, the slit was maintained at the parallactic angle
through out the rather long observation of the B component. In the
realistic case of a small offset between the centre of the Ly-alpha
emission and the position of the component B on the sky the Ly-alpha
emitter must be moving inside the slit as a function of time. If the
Lyman-alpha emission is precisely located on top of the B image I find
it difficult to believe it is real emission from a foreground galaxy. The 2d-spectrum would be interesting to see.

2) I am trying to understand the picture: I suppose the Lyman-alpha
emitter and the two absorbers are probes of the same underlying galaxy.
The Lyman-alpha emitter must be locate close to the centre of the
object. Then I would also think the B sightline would probe gas closer
to the centre of the galaxy than the A sightline. Yet, the absorption is
much stronger in the A sightline that in sightline B. Is this not odd?

Comment on Smoothed Particle Hydrodynamics by smadar

smadar — Fri, 09 Jul 2010 19:51:29 +0000

I think it’s a good review for all who want to learn about sph -

Comment on Is tidal heating sufficient to explain bloated exoplanets? Consistent calculations accounting for finite initial eccentricity by Sara

Sara — Thu, 08 Jul 2010 16:27:52 +0000

Hi all,

I know this paper is quite old now, and I’m not sure if we got to discuss this in our JC meeting, if so just please ignore this post. But I found it interesting and worth discussing.

Comment on Out of Whack Planetary System Offers Clues to a Disturbed Past by smadar

smadar — Wed, 30 Jun 2010 01:51:14 +0000

well, especially since my increasing interest in inclined multiple systems

Comment on Hanny’s Voorwerp: Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497 by Nathan

Nathan — Thu, 24 Jun 2010 06:23:50 +0000

I will not be at coffee tomorrow, so I will bump it for Friday if no one else votes for it.

Comment on A giant planet imaged in the disk of the young star Beta Pictoris by James Guillochon

James Guillochon — Fri, 18 Jun 2010 04:47:54 +0000

This planet is basically the evil twin of the planet we discussed yesterday...

Comment on Astronomy 3.0 Style by James Guillochon

James Guillochon — Fri, 04 Jun 2010 17:16:27 +0000

And, unfortunately, I have to miss coffee today for a meeting. Please vote for more papers guys!

Comment on Astronomy 3.0 Style by James Guillochon

James Guillochon — Fri, 04 Jun 2010 03:31:32 +0000

This paper is very coincidentally related to our site overhaul!

Comment on Colloquium Club 05/24/2010 by Kevin Schlaufman

Kevin Schlaufman — Mon, 24 May 2010 17:14:31 +0000

http://adsabs.harvard.edu/abs/2003A%26A…398..541K

Comment on Dust/gas correlations from Herschel Observations by Nathan

Nathan — Tue, 18 May 2010 02:01:48 +0000

I will not be at coffee on Tuesday. If no one else votes for this, I will bump it and talk about it on Wednesday.

Comment on Orbits Around Black Holes in Triaxial Nuclei by James Guillochon

James Guillochon — Tue, 04 May 2010 15:52:54 +0000

Scratch that, I will be around today.

Comment on Orbits Around Black Holes in Triaxial Nuclei by James Guillochon

James Guillochon — Tue, 04 May 2010 01:02:44 +0000

This paper is really cool! I can’t make coffee tomorrow, but I’ll vote on it for Wednesday’s discussion.

Comment on The Dark Molecular Gas by Nathan

Nathan — Mon, 03 May 2010 03:35:32 +0000

If no one else votes on this, I will bump it and talk about it Wednesday since I’ll be in class on Tuesday.

Comment on Repeating Tidal Disruption of Stars as a Prompt Electromagnetic Signature of Supermassive Black Hole Coalescence by James Guillochon

James Guillochon — Wed, 28 Apr 2010 03:56:50 +0000

Realized I won’t be here tomorrow, I’ll bump both papers I voted for to Friday.