Astronomy Colloquium 2022 Fall Semester

* Date

Dec 1

* Speaker

전명원(경희대학교)

* Title

Finding Fossil Records of the First Stars in the Local Dwarfs.

* Abstract

Stellar archeology plays a crucial role in studying the nature of the first stars, in particular, in local dwarf galaxies, given that detecting the light emitted from the first generation of stars will be extremely challenging even with the James Webb Space Telescope (JWST). This approach offers an alternative window by providing great details to characterize the first stars and a complementary understanding of far-field cosmology. In this talk, we will present the results of cosmological hydrodynamic simulations of the ultra-faint dwarf (UFDs) analogs to identify possible relics of the first stars. Specifically, we will discuss faint Pop III SNe’s role in explaining carbon-enhanced metal-poor stars (CEMPs) found in the observed UFDs. Furthermore, we will discuss how the properties of the simulated UFDs can vary depending on the effect of patchy reionization.