Journal Club

Fall 2006

Geoff Bower

September	1	Michael Cooper	"Cats and Dogs, Hair and a Hero: A Quintet of New Milky Way Companions" Belokurov et al. [astro-ph/ 0608448]
	8	Stella Offner	"Molecular Cloud Evolution II: Fun with SPH" Vazquez-Semadeni et al [astro-ph/0608375]
	15	Ruth Murray-Clay	"Atmospheres of Protoplanetary Cores: Critical Mass for Nucleated Instability" Rafikov, R. 2006, ApJ, 648, 666
	22	Bryan Mezger	"The M-Sigma Relation for Nucleated Galaxies"
	29	Katie Peek	"Cluster Disruption: Combining Theory and Observations" (astro-ph/0609669)
October	6	Bryan Gaensler	The 2004 Magnetar Hyperflare
	13	Dan Perley	"Was GRB 051103 an extragalactic magnetar flare?"
	20	Dovi Poznanski	SN progenitors and rates from low-cost surveys with no spectroscopy Ongoing supernova (SN) surveys find hundreds of candidates that require confirmation for their use as cosmological tools, either as standard candles, or as tracers of galaxy formation and metal enrichement. Traditional classification based on followup spectroscopy of all candidates is virtually impossible for these large samples. I will present an automatic Bayesian classifying algorithm, that relies solely on single-epoch multiband photometry and host-galaxy (photometric) redshift information, to sort SN candidates. I will demonstrate the performance of our method on published SN samples from the SNLS and GOODS projects. I use the algorithm to classify a new sample of about 50 high-z SNe we have found in the Subaru Deep Field. We observed the field for two nights with the Subaru telescope, and reached a depth, effective area, and number of SNe comparable to those of the GOODS SN survey. Finally, I will describe a search for intermediate-redshift SNe in the SDSS archive.
	27	Katie Alatalo	The Evolution of Obscuration in AGN http://xxx.lanl.gov/abs/astro-ph/0610525
November	3	Jonathan Tan	Star Formation Near and Far We are a long way from having a complete theory of star formation. In this talk I describe a number of projects through which we can attempt to understand how star formation, particularly massive star formation, occurs in a range of galactic environments. We start with massive star and star cluster formation in our local Galactic neighborhood, exemplified by the Orion Nebula Cluster. We look for differences between star formation in dwarf irregular and spiral galaxies. Continuing to the environs of supermassive black holes, we find star formation is a natural and important part of their accretion process. Finally we apply the knowledge we have gained about local star formation to make a theoretical prediction for how it occurs in the high redshift, metal-free universe.
	10	Veterans Day
	17	Renbin Yan	"The asymmetric relations among galaxy color, structure, and environment" by Alejandro D. Quintero, Andreas A. Berlind, MichaelR. Blanton, David W. Hogg http://xxx.lanl.gov/abs/astro-ph/0611361
	24	Thanksgiving holiday
December	1	Holly Maness	"Diffraction Limited Imaging of the Stellar Population of IC 10 with Laser Guide Star Adaptive Optics and the Hubble Space Telescope," Vacca et al. (2006)
	8	Karin Sandstrom	"Mid Infrared Emission at Photodissociation Regions in the Orion Nebula" Kassis et al 2006 2006ApJ...637..823K
	15	Tim Robishaw	It's Magnetic Friday The Galactic distribution of magnetic fields in molecular clouds and HII regions by J.L. Han & J.S. Zhang http://xxx.lanl.gov/abs/astro-ph/0611213 Magnetically Dominated Strands of Cold Hydrogen in the Riegel-Crutcher Cloud by N.M. McClure-Griffiths J.M. Dickey, B.M. Gaensler, A.J. Green, and Marijke Haverkorn http://www.journals.uchicago.edu/ApJ/journal/issues/ApJ/v652n2/65564/65564.html And a sneak-peek at Tim's AAS Talk: The Discovery of Extragalactic Magnetic Fields in OH Megamasers

All meetings at 12:10 pm in 544 Campbell.