FLASH Talks: Co-formation of the Milky Way's thin and thick discs

Friday, 11 February 2022 noon — 1 p.m. MST

Leandro Beraldo e Silva (UMich)
Leandro Beraldo e Silva, UMich
Co-formation of the Milky Way's thin and thick discs
Thin disc stars are younger than thick disc stars on average, and some models predict the thin disc to start forming only after the thick disc has formed, around 10 Gyr ago. According to these sequential scenarios, no significant old thin disc population should exist. In this talk, I will show recent observational evidence for the presence, in the MW, of an old thin disc population. I will discuss how the observed trends disfavour sequential scenarios but can be nicely accommodated in the early clumpy star formation scenario. Incidentally, I will also show evidence, in the MW, for radial migration in both thin and thick disc populations.
FLASH Talks are scientific talks for the staff at NOIRLab and the University of Arizona's Steward Observatory. 
If you or a collaborator are interested in presenting at FLASH please get in touch. All FLASH talks are virtual for the foreseeable future, so feel free to suggest speakers from outside of Tucson!