Lunch talk

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

[POSTPONED DUE TO COVID-19] Star-forming Clumps in Local Luminous Infrared Galaxies

Friday, March 13, 2020 - 12:15pm to 1:00pm
Kirsten Larson (Caltech)

Local luminous infrared galaxies (LIRGS) are a mixture of single disk galaxies, interacting systems, and advanced mergers, exhibiting enhanced star formation rates and AGN activity. This makes them an ideal laboratory of studying resolved star formation in the local Universe.

Observational Constraints on the Origin of the Galactic center S-stars

Friday, January 24, 2020 - 12:15pm to 1:00pm
Devin Chu (UCLA)

The formation mechanism of the young S-stars located within an arcsecond of the supermassive black hole remains a mystery. Proposed formation scenarios for these S-stars include the tidal disruption of a binary system and migration from the clockwise disk of young stars.

Placing the Solar System into the Galactic Exoplanet Census

Friday, January 17, 2020 - 12:15pm to 1:00pm
Songhu Wang (Yale)

While the exoplanetary field is replete with remarkable discoveries, perhaps the two most intriguing findings have been the startling abundance of super-Earths – a type of world entirely missing from our solar system, and the detection of hot Jupiters – giant planets orbiting perilously close to

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


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