I regret to inform you that I failed to find a host this week for the colloquium speaker (Gunther Hassinger), not because of lack of volunteers, but through my own faults.

I apologize for the inconvenience, this will not happen again.

Rodolfo.

This week our colloquium speaker will be James Bullock. He will be talking about dwarf galaxies around the Milky Way and “massive failures”. He suggested the following paper for discussion this Monday:
http://adsabs.harvard.edu/abs/2012MNRAS.422.1203B

See you then,
Valentino.-

This week’s colloquium speaker is Vicky Meadows from UW. She’s an expert on detecting planet habitability. I’ll be talking about a paper by her student Tyler Robinson on detecting exo-oceans http://arxiv.org/abs/1008.3864. If we have time we can also talk about a proceedings she wrote with Rory Barnes on habitability around M stars http://arxiv.org/abs/1012.1883.

-Eric

This week’s colloquium and COSMOCLUB speaker is Lia Athanassoula. She is an expert on bars, in particular, simulations of bars. She’ll be talking about secular evolution of bars in COSMOCLUB and how to get spiral structure at colloquium. She recommended these papers to go over:

http://adsabs.harvard.edu/abs/2005MNRAS.358.1477A

http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?2003MNRAS.341.1179A&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf

I think I’ll go over the latter, ‘What determines the strength and slow down of bars?’

-Edmond

This week’s colloquium speaker will be Caroline Terquem, she will talk about planetary migration and protoplanetary disks. I will be discussing the following papers on Monday,

Eccentricity pumping of a planet on an inclined orbit by a disc
Terquem, Caroline; Ajmia, Aikel
2010MNRAS.404..409T

http://arxiv.org/abs/1001.0657

Migration and the Formation of Systems of Hot Super-Earths and Neptunes
Terquem, Caroline; Papaloizou, John C. B.
2007ApJ…654.1110T

http://arxiv.org/abs/astro-ph/0609779

Rodolfo.

http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2012.20536.x/abstract

http://adsabs.harvard.edu/abs/2010MNRAS.401.1613N

I’ll be focusing on the first paper but may get to the second if we have time.

http://adsabs.harvard.edu/abs/2011MNRAS.417..882D

http://adsabs.harvard.edu/abs/2011MNRAS.410.1197C

–Jerome

Supernovae 2011fe lightcurve and implications for radioactive isotopes: http://adsabs.harvard.edu/abs/2012arXiv1201.5398P

Tidal heating/synchronization in a double white dwarf binary: http://adsabs.harvard.edu/abs/2011ApJ…740L..53P

–Morgan

My official talk is a summary of results from Herschel.  So naturally this
is much broader than my own work, which is focused on molecular clouds and
star formation, primarily in the Milky Way. I use radio, mm, submm, and IR
observations to try to study the origin and evolution of molecular clouds,
and how their structure controls the rate of star formation and other key
processes.

The papers I'm attaching are something of a "grab bag" including Herchel
and non-Herschel results.

1) http://adsabs.harvard.edu/abs/2010ApJ...715.1370G
2) http://adsabs.harvard.edu/abs/2008ApJ...680..428G
3) http://adsabs.harvard.edu/abs/2010ApJ...724.1402K
4) http://adsabs.harvard.edu/abs/2010A%26A...521L..17L

http://www.nature.com/nature/journal/v480/n7376/full/nature10636.html

with supplementary information here:

http://www.nature.com/nature/journal/v480/n7376/extref/nature10636-s1.pdf

http://lanl.arxiv.org/abs/1111.0347

Neil

This time, I will be discussing Roger’s papers on observations of gamma ray pulsars,

http://arxiv.org/abs/1106.5762

http://arxiv.org/abs/1111.3074

(1) Allevato, …, Hasinger  et al., 2011, ApJ 736, 99

(2) Cowie, Barger & Hasinger, 2011, arXiv1110.3326

This week’s colloquium speaker is Kaitlin Kratter. She will be talking about

star and planet formation. On Wednesday at 10:45 am I will be discussing

the following paper she recommended:

http://adsabs.harvard.edu/abs/2010ApJ…708.1585K

Thanks,

Anna

On Tuesday I’ll be discussing the following paper he recommended for background:

http://arxiv.org/pdf/0704.2291

Fundamentalist physics: why Dark Energy is bad for Astronomy by Simon D.M. White (2007).

http://arxiv.org/abs/astro-ph/0507298 for a review of Dusty IR Galaxies as a source of the Cosmic IR Background, and

http://arxiv.org/abs/1101.2028 for the early results on this subject from Planck.

On Monday we’ll be discussing papers for Elizabeth Blanton’s colloquium.  She recommended the following two:

http://adsabs.harvard.edu/abs/2010PNAS..107.7174B Blanton et al. 2010 “Active galactic nucleus feedback in clusters of galaxies”

http://adsabs.harvard.edu/abs/2011AJ….141…88W

Wing & Blanton 2011 “Galaxy Cluster Environments of Radio Sources”

Ghez et al. 2008 http://adsabs.harvard.edu/abs/2008ApJ…689.1044G
Lu et al. 2009 http://adsabs.harvard.edu/abs/2009ApJ…690.1463L
Do et al. 2009 http://adsabs.harvard.edu/abs/2009ApJ…703.1323D

See you there!

http://arxiv.org/abs/astro-ph/0201166

http://adsabs.harvard.edu/abs/2010ApJ…719..915C

and if there’s time,

http://adsabs.harvard.edu/abs/2009ApJ…699…40S

http://www.nature.com/nature/journal/v477/n7364/full/nature10417.html

http://iopscience.iop.org/0004-637X/688/1/254/pdf/72817.web.pdf

http://arxiv.org/abs/1012.0912

See you Monday.

http://arxiv.org/abs/1008.0031

If we have time, we will also discuss WISE results on NEOs and brown dwarfs:

http://arxiv.org/abs/1109.6400
http://arxiv.org/abs/1108.4678

See you on Monday!

We’ll be discussing the following paper on Monday about the merger of double white dwarf binaries to prepare for Ken Shen’s colloquium:  http://voxcharta.org/?s=1108.4036

For some background on the single-degenerate Ia supernova channel Ken referred us to the following: http://adsabs.harvard.edu/abs/1982ApJ…253..798N

See you there,

Morgan

Velocity Evolution and the Intrinsic Color of Type Ia Supernovae

A heavily related paper (also by Ryan) that we’ll cover in less detail:

Measuring Ejecta Velocity Improves Type Ia Supernova Distances

http://xxx.lanl.gov/pdf/1103.5252

Those looking for extra credit may also read this one:

http://xxx.lanl.gov/pdf/1108.3852

http://adsabs.harvard.edu/abs/2008ApJ…677L…5V
http://adsabs.harvard.edu/abs/2010ApJ…717L.103N

The main paper describing the The High Time Resolution Universe Pulsar Survey:
http://adsabs.harvard.edu/abs/2010MNRAS.409..619K

A paper describing the discovery of a radio Magnetar:
http://adsabs.harvard.edu/abs/2010ApJ…721L..33L

A paper describing the discovery of 5 MSPs:
http://adsabs.harvard.edu/abs/2011arXiv1101.4778B

“A Spatially Resolved Inner Hole in the Disk Around GM Aurigae”
Hughes et al. (2009)
http://adsabs.harvard.edu/abs/2009ApJ…698..131H

At coffee on Wednesday I’ll be leading the discussion of Bob Heeter’s paper:

“Charge-State Distribution and Doppler Effect in an Expanding Photoionized Plasma”
Foord, Heeter, et al. (2004)

http://adsabs.harvard.edu/abs/2004PhRvL..93e5002F

This paper describes a technique for measuring X-ray spectra from X-ray photoionized iron plasmas driven by a large Z-pinch.

We shall focus on Toomre’s 1981 conference proceeding
http://adsabs.harvard.edu/abs/1981seng.proc..111T

We will talk about it at coffee tomorrow.

Thanks,
Mark

FIREBall (Balloon-borne UV spectrograph): http://www.srl.caltech.edu/sal/fireball-spie.pdf

Keck Cosmic Web Imager (Wide-field optical IFU):  http://www.srl.caltech.edu/sal/spie_paper_number_7735_22_f.pdf

“Organic Molecules and Water in the Planet Formation Region of Young Circumstellar Disks”
Carr and Najita (2008)
http://adsabs.harvard.edu/abs/2008Sci…319.1504C

I will also attempt to provide some context for this result, as it is one of an increasing number that shows flat abundance gradients in the far outskirts of galaxies.

I will also look at: http://iopscience.iop.org/1538-4357/684/2/L79/pdf/592231.pdf  as it is cited in the Vlajic paper as explaining the result.

“Narrowband Imaging of Escaping Lyman-Continuum Emission in the SSA22 Field” (http://arxiv.org/abs/1102.0286)

See you there,

Gabor

http://www.physics.ucsd.edu/~tmurphy/phys239/shu_energy.pdf

-Luke

Black Hole Formation in Failing Core-Collapse Supernovae

http://adsabs.harvard.edu/abs/2010arXiv1010.5550O

Dynamics and Gravitational Wave Signature of Collapsar Formation

http://adsabs.harvard.edu/abs/2010arXiv1012.1853O

http://lsst.org/files/docs/overview_v1.0.pdf

and the LSST website http://www.lsst.org/

“Understanding current causes of women’s underrepresentation in science,” Stephen J. Ceci and Wendy M. Williams 2011, Proceedings of the National Academy of Sciences, 10.1073/pnas.1014871108

http://www.pnas.org/content/early/2011/02/02/1014871108

(you can also check out the Wired article: http://www.wired.com/wiredscience/2011/02/gender-discrimination-science)

I don’t expect to exhaust this topic, but if we really want to talk science let’s discuss the recent paper:

Bennert et al. 2011, “The Relation between Black Hole Mass and Host Spheroid Stellar Mass out to z~2,” arXiv:1102.1975

http://adsabs.harvard.edu/abs/2011arXiv1102.1975B

http://adsabs.harvard.edu/abs/2009PASP..121.1334R

http://adsabs.harvard.edu/abs/2009PASP..121.1395L

In preparation for Dusan Keres’ Colloquium on Wednesday, we will be discussing the following paper:

http://adsabs.harvard.edu/abs/2009MNRAS.395..160K

In preparation for Matthew McQuinn’s FLASH on Friday, we will be discussing the following paper:
http://arxiv.org/abs/1003.1750

This Monday 01/24, in preparation for Wednesday’s colloquium by Brant Roberton, we will discuss the following paper:
http://adsabs.harvard.edu/abs/2008ApJ…680.1083R

This week we also have a FLASH by Phil Hopkins and is my understanding that on Monday Rosalie will also lead a discussion on a paper by him.

Phil hasn’t sent a paper yet or sent his faculty host a talk title, so Rosalie has picked one of his recent papers to present:

An explanation for the slopes of stellar cusps in galaxy spheroids

http://adsabs.harvard.edu/abs/2011MNRAS.411L..61H

This week we also have a FLASH by Phil Hopkins and is my understanding that on Monday Rosalie will also lead a discussion on a paper by him.

http://arxiv.org/abs/1005.4934

http://adsabs.harvard.edu/abs/2008MNRAS.385.2181F

http://adsabs.harvard.edu/abs/2010MNRAS.408.2115M

We will be focusing primarily on the 2009 paper but may refer to the 2005 one.

“Stellar Structure and Tests of Modified Gravity”
http://arxiv.org/abs/1011.4107v1

2) http://adsabs.harvard.edu/abs/2010PhRvD..81f3531B – this shows how galaxy-galaxy lensing and galaxy clustering can be used to constrain cosmology

Notice that the discussion will happen on Tuesday 11/09.

Hope to see you there,
Valentino.-

The 1998 paper by Eggleton et al. provides some useful background: http://adsabs.harvard.edu/abs/1998ApJ…499..853E

Bulgeless dwarf galaxies and dark matter cores from supernova-driven outflows

Letter (PDF)

There is a fair amount of supplemental information attached as well, if you are interested in the details of their simulation.

Supplementary Information (PDF)

Movie (MOV)

Thanks,
Judy

Smith & Owocki, 2006, ApJL, 645, L45

“On the Role of Continuum-driven Eruptions in the Evolution of Very Massive Stars and Population III Stars”

http://adsabs.harvard.edu/abs/2006astro.ph..6174S

Stephanie Wachter says that this is “a good letter that touches on many aspects of [her] talk .”

Abstract for talk:

Shells, Bubbles and Rings: Eruptive Mass Loss on the Path to Supernovae

Massive stars play a key role in the chemical and mechanical evolution of the ISM in galaxies.  These luminous stars with their strong winds and mass outflows shape their local environment, which in turn has implications for the observed evolution of type II supernova events.  Despite their importance, our knowledge about the formation and evolution of massive stars is surprisingly limited. In particular, the post main sequence evolution of massive stars, when they shed most of their mass, is poorly understood. Observationally, this stage can be explored through the study of Wolf-Rayet stars (WRs), luminous blue variables (LBVs) and red supergiants.  We have recently discovered a large, obscured population of these rare evolved massive stars, which is characterized by prominent circumstellar shells in 24 micron observations from the Spitzer Space Telescope. Our IR spectroscopic follow-up of the central sources of these shells has revealed several new WRs, as well as a large number of candidate LBVs that  – if confirmed – would double the existing sample. I will discuss the properties of these shell sources in the context of massive star evolution. I will also present an overview of the status and scientific capabilities of the WISE mission and its potential for massive star research.

1.  A Substantial Population of Low Mass Stars in Luminous Elliptical Galaxies

http://adsabs.harvard.edu/abs/2010arXiv1009.5992V

2.  Dust Attenuation in Disk-dominated Galaxies: Evidence for the 2175 Å Dust Feature

http://adsabs.harvard.edu/abs/2010ApJ…718..184C

The next paper is background reading:

3.  The Propagation of Uncertainties in Stellar Population Synthesis Modeling. I. The Relevance of Uncertain Aspects of Stellar Evolution and the Initial Mass Function to the Derived Physical Properties of Galaxies

http://adsabs.harvard.edu/abs/2009ApJ…699..486C

Data:
Currie, T., et al., 2010, ApJ, 721, L177

http://adsabs.harvard.edu/abs/2010ApJ…721L.177C

Theory:
Burrows, A., Sudarsky, D., Hubeny, I., 2006, ApJ, 650, 1140

http://adsabs.harvard.edu/abs/2006ApJ…650.1140B

((FYI)
(He also sent this one but I’m doing similar stuff, so don’t worry about
it as I’d be happy to summarize it for you:)
Method:
Lafreniere, D., et al., 2007, ApJ, 660, 770
http://adsabs.harvard.edu/abs/2007ApJ…660..770L )

The paper can be found here

Asphaug, E.
Similar-sized collisions and the diversity of planets
Chemie der Erde – Geochemistry
Volume 70, Issue 3, 2010, Pages 199-219

“Helium Lines in RR Lyrae Spectra,”
Preston (2009)
http://adsabs.harvard.edu/abs/2009A%26A…507.1621P

This week, we are going to be hosting our very own Greg Laughlin as the colloquium speaker.

He suggested the following paper as a good start for “An inside look at Extrasolar Planets“:

http://adsabs.harvard.edu/abs/2009ApJ…704L..49B

We’ll discuss this paper during the morning coffee on Monday.

-Bülent Kızıltan

To prepare for Jeremy Darling’s colloquium this week, we will be discussing the first paper below (and the second one if we have time) tomorrow at Colloquium Coffee.

http://adsabs.harvard.edu/abs/2008ApJ…673..832M
“Formaldehyde Densitometry of Starburst Galaxies ”
Mangum, J. G., Darling, J., Menten, K. M., Henkel, C.  2008,
Astrophys. J., 673, 832

http://adsabs.harvard.edu/abs/2007ApJ…669L…9D
“A Dense Gas Trigger for OH Megamasers ”
Darling, J.   2007, Astrophys. J., 669, L9

An extra paper is

http://adsabs.harvard.edu/abs/2010ApJ…709..386Z
“Formaldehyde Anti-Inversion at z = 0.68 in the Gravitational Lens B0218+357 ”
Zeiger, B. & Darling, J.   2010, Astrophys. J., 709, 386

See you tomorrow!
~Rosalie

Bigiel et al 2008, AJ, 136, 2846

I will also mention/discuss some selected topics from:

Leroy et al 2008, AJ, 136, 2782

Cheers,
Robert

The WHIQII Survey: Metallicities and Spectroscopic Properties of Luminous Compact Blue Galaxies

http://iopscience.iop.org/0004-637X/708/2/1076/

At coffee on Monday I’ll be leading the discussion of Melissa Enoch’s recent paper:

Properties of the Youngest Protostars in Perseus, Serpens, and Ophiuchus
Enoch et al. (2009)
http://adsabs.harvard.edu/abs/2009ApJ…692..973E

Just read Section 10.  If you don’t yet know what Class 0, Class I, and Class II protostars are, then to make sense of the Enoch et al. paper it will help to read Section 4.1.3 up to the heading “Brown dwarfs” in:

Theory of Star Formation
McKee & Ostriker (2007)
http://adsabs.harvard.edu/abs/2007ARA%26A..45..565M ]]> http://voxcharta.org/2010/04/02/colloquium-club-04052010/feed/ 0 http://voxcharta.org/2010/03/29/colloquium-this-week-andrew-blain/ http://voxcharta.org/2010/03/29/colloquium-this-week-andrew-blain/#comments Tue, 30 Mar 2010 05:15:54 +0000 Valentino http://voxcharta.org/?p=18981 Andrew Blain has suggested that we discuss the following paper:

http://arxiv.org/abs/0910.3642

See you at coffee,

Valentino.-

http://arxiv.org/abs/0708.1523

http://adsabs.harvard.edu/abs/2008ApJ…675..281M

Tidal dissipation in rotating fluid bodies: a simplified model

http://adsabs.harvard.edu/abs/2009MNRAS.396..794O

The HARPS search for southern extra-solar planets
XIII. A planetary system with 3 super-Earths (4.2, 6.9, and 9.2 M⊕)

http://adsabs.harvard.edu.oca.ucsc.edu/abs/2009A%26A…493..639M

http://arxiv.org/abs/1002.0592

Jappsen et al. 2005 “The Stellar Mass Spectrum From Non-isothermal Gravoturbulent Fragmentation”

http://adsabs.harvard.edu/abs/2005A&A…435..611J

Clark et al. 2008 “The First Stellar Cluster”

http://adsabs.harvard.edu/abs/2008ApJ…672..757C

“The Imprint of Dissipation on the Shapes of Merger Remnant LOSVDs” -
http://adsabs.harvard.edu.oca.ucsc.edu/abs/2009ApJ…705..920H

We will discuss this paper:
Can Dry Merging Explain the Size Evolution of Early-Type Galaxies?
http://adsabs.harvard.edu/abs/2009ApJ…706L..86N

and maybe this one:
The Distribution of Dark Matter Over Three Decades in Radius in the
Lensing Cluster Abell 611
http://adsabs.harvard.edu/abs/2009ApJ…706.1078N

A super-Earth transiting a nearby low-mass star
Charbonneau et al. (2009)
http://adsabs.harvard.edu/abs/2009Natur.462..891C

There is also an interesting figure in Geoff Marcy’s accompanying News and Views article in the same issue of Nature:

http://adsabs.harvard.edu/abs/2009Natur.462..853M

K. Zahnle, M. S. Marley, J. J. Fortney

We use a 1D thermochemical and photochemical kinetics model to predict that the stratospheric chemistry of hot Jupiters should change dramatically as temperature drops from 1200 to 1000 K. At 1200 K methane is too unstable to reach the stratosphere in significant quantities, while thermal decomposition of water is a strong source of OH radicals that oxidize any hydrocarbons that do form to CO and CO$_2$. At 1000 K methane, although very reactive, survives long enough to reach the lower stratosphere, and the greater stability of water coupled with efficient scavenging of OH by H$_2$ raise the effective C/O ratio in the reacting gases above unity. Reduced products such as ethylene, acetylene, and hydrogen cyanide become abundant; such conditions favor polymerization and possible formation of PAHs and soots. Although low temperature is the most important factor favoring hydrocarbons in hot Jupiters, higher rates of vertical mixing and generally lower metallicities also favor organic synthesis. The peculiar properties of HD 189733b compared to other hot Jupiters–a broadband blue haze, no sign of Na or K, and hints that CO might be underabundant–can be explained by an organic haze if the planet is cool enough. Whether this interpretation applies to HD 189733b itself, many organic-rich warm Jupiters are sure to be discovered in the near future.

Best,

Valentino.-

I preparation for Mike Kuhlen’s colloquium we’ll go over the
following paper:

http://arxiv.org/abs/0907.0005

The main Science article is not too detailed, so Mike recommended
the arXiv version which also contains the Supplementary Online
Material.

Best,
Javiera

“High-Resolution Spectroscopy of Extremely Metal-Poor Stars in the Least
Evolved Galaxies: Ursa Major II and Coma Berenices,”
Frebel et al. (2009)

http://adsabs.harvard.edu/abs/2009arXiv0902.2395F

Please look at Sections 1, 4, and 5; also skim Section 3.

She will be speaking about three short papers. We will focus on the two newer papers; I am including the third in this email mostly as background reading for you.

http://adsabs.harvard.edu/abs/2009MNRAS.396.1640D
http://adsabs.harvard.edu/abs/2009ApJ…703L..86V
http://adsabs.harvard.edu/abs/2007ApJ…663L…5V

There is a long list of Fermi-LAT collaboration publications that you may want to skim through. We will discuss one of the latest short Science papers during morning coffee on Monday:

Title: A Population of Gamma-Ray Millisecond Pulsars Seen with the Fermi Large Area Telescope
URL: http://adsabs.harvard.edu/abs/2009Sci…325..848A

For those who won’t access to the Science web site over the weekend, I have a PDF copy at:
http://astro.ucsc.edu/~bulent/else/Atwood.MSP.pdf