Title: X-Ray Binary Populations in the Andromeda Galaxy: Insights from the NEW-ANGELS Survey

Speaker: Professor Rui Huang  (University of Michigan)

Time: 9:30am, January 6, 2025

Location: 3-302, PMO Xianlin Campus

Abstract: The Andromeda Galaxy (M31), our nearest massive spiral neighbor, provides a unique opportunity to study X-ray source populations similar to those in the Milky Way. Using the deepest and widest observations from our NEW-ANGELS survey, we have detected and analyzed over 4,500 X-ray sources across M31’s bulge, disk, and halo with XMM-Newton data. By creating X-ray luminosity functions (XLFs) for different regions and correcting for incompleteness, our study finds that M31 is dominated by low-mass X-ray binaries (LMXBs) and exhibits fainter X-ray emission compared to other nearby galaxies. The XLFs vary across different regions of M31, and by incorporating detailed star formation histories, we constrain binary luminosity evolution models. These results enhance our understanding of the relationship between stellar populations and X-ray emissions, providing important constraints for models of binary and galaxy evolution.