Lunch talk on Oct. 26, 2026

Unveiling Star Formation in the Early Universe through Nearby Dwarf Galaxies

Speaker: Yujiao Yang (CAS)

Venue: SWIFAR Building 2111

Time: 12:45 PM, Monday, Oct. 26, 2026

Abstract: 

Understanding star formation in the early Universe is crucial for revealing how galaxies formed and evolved. Nearby dwarf galaxies serve as fossil records of early star formation, preserving valuable information in their ancient stellar populations. In this talk, I will explore the star formation histories (SFHs) of nearby galaxies using two complementary approaches: color–magnitude diagram (CMD) fitting and galactic chemical evolution (GCE) modeling. Combining photometric and spectroscopic observations, these methods constrain not only when stars formed but also the physical processes regulating star formation. Focusing on the dwarf spheroidal galaxies Draco and Sextans, I will discuss what their stellar populations reveal about early galaxy evolution and star formation around the epoch of reionization.