Lunch talk

This is a talk given at lunch time, usually in the conference room at noon.

Stellar kinematics of z~2 galaxies and the inside-out growth of quiescent galaxies

Friday, December 14, 2012 - 9:15am
Jesse van de Sande (Leiden)

The remarkable compactness of massive quiescent galaxies at z ~ 2 remains a highly debated issue. Whereas the size measurements of these compact galaxies have now been confirmed using deep imaging with WFC3 on HST, the stellar masses remain highly uncertain.

Understanding the Nature of Stellar Chemical Abundance Distributions in Nearby Stellar Systems

Friday, January 4, 2013 - 9:15am
Duane Lee (Columbia)

Since stars retain, in large part, a signature of their galactic origin in their chemical compositions, we can exploit the chemical abundance distributions that we observe in stellar systems to put constraints on the nature of their progenitors.

Optimal Mass Configurations for Lensing High-Redshift Galaxies (and how to find them in the SDSS!)

Friday, October 26, 2012 - 9:15am
Ken Wong (Arizona)

We investigate whether lines of sight containing multiple cluster-scale halos are the best cosmic telescopes for lensing high-redshift (z~10) sources into detectability.  For lines of sight of fixed angular size and total mass, we test how the lensing cross section and the number of faint galaxie


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