Origin of metals in the early Universe: Implications from old Galactic stellar populations featuring Miho Ishigaki (NAOJ)

*Please note that this seminar is at 7pm ET on Thursday, April 13th*

Hosted by Kanji Mori (Fukuoka University, Japan)

One of the major goals of modern spectroscopic surveys of stellar populations in the Milky Way Galaxy is to constrain astrophysical sources of metals at different times and places in the Universe. Thanks to large-scale spectroscopic surveys, detailed elemental abundance estimates for statistical samples of various Galactic stellar populations are rapidly increasing. Interpreting those data sets in terms of nucleosynthesis yields of stars and supernovae, such as core-collapse supernovae or Type Ia supernovae, will help with understanding their explosion mechanisms as well as the progenitor stars. I would like to review current constraints on the origin of metals by comparing supernova yield models with observed elemental abundance patterns, with particular emphasis on the oldest or the most metal-poor stars. Prospects with upcoming wide-field spectroscopic survey of Galactic stars, including Prime Focus Spectrograph (PFS) on the Subaru Telescope, are also discussed.