Journal Club

Fall 2006

Geoff Bower

Michael Cooper
"Cats and Dogs, Hair and a Hero: A Quintet of New Milky Way Companions"
Belokurov et al. [astro-ph/ 0608448]

Stella Offner
"Molecular Cloud Evolution II: Fun  with SPH"
Vazquez-Semadeni et al [astro-ph/0608375]

Ruth Murray-Clay
"Atmospheres of Protoplanetary Cores: Critical Mass for Nucleated
Rafikov, R. 2006, ApJ, 648, 666

Bryan Mezger
"The M-Sigma Relation for Nucleated Galaxies"

Katie Peek
"Cluster Disruption: Combining Theory and Observations"

*Bryan Gaensler*
The 2004 Magnetar Hyperflare

Dan Perley
"Was GRB 051103 an extragalactic magnetar flare?"

*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.

Katie Alatalo

The Evolution of Obscuration in AGN

*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.

*Veterans Day*

Renbin Yan
"The asymmetric relations among galaxy color, structure, and environment"
by Alejandro D. Quintero, Andreas A. Berlind, MichaelR. Blanton, David W.

*Thanksgiving holiday*

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)

Karin Sandstrom
"Mid Infrared Emission at Photodissociation Regions in the Orion  Nebula"
Kassis et al 2006

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

Magnetically Dominated Strands of Cold Hydrogen in the Riegel-Crutcher
by N.M. McClure-Griffiths J.M. Dickey, B.M. Gaensler, A.J. Green, and
Marijke Haverkorn

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.