Lunch talk

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

The Oldest Extremely Metal-poor Stars

Friday, February 14, 2020 - 12:15pm to 1:00pm
Henrique Reggiani (JHU)

The chemical abundances of the oldest stars in a galaxy can be used to investigate the earliest stages of its formation and chemical evolution.  It is tempting to assert that the most metal-poor stars in a large galaxy with a complex accretion history like the Milky Way are the direct descendants

A census of AGN-driven ionized outflows at the cosmic high noon with the MOSDEF survey

Friday, November 8, 2019 - 12:15pm to 1:00pm
Gene Leung (UCSD)

Using data from the MOSDEF survey, we present a census of AGN-driven ionized outflows in a sample of 159 AGNs at 1.4 < z < 3.8, the largest such sample at z ~ 2. We detect outflows in 17% of the AGNs, seven times more often than in a mass-matched sample of inactive galaxies in MOSDEF.

Galactic Archeology of the Brightest Cluster Galaxy M87

Friday, October 18, 2019 - 12:15pm to 1:00pm
Alexa Villaume (UCSC)

The galactocentric radial metallicity gradients of GC systems can be used to probe the assembly histories of galaxies but doing so is complicated by: 1.) a GC system is an aggregate population of several (or many) different subpopulations of different origins, and 2.) computing the gradients with


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