AR 17552 (Archival Research)

Mon Jul 15 05:52:44 GMT 2024

Principal Investigator: Rupali Chandar
PI Institution: University of Toledo
Investigators (xml)

Title: Identifying X-ray Binaries with High-Mass Donor Stars in Nearby Spiral Galaxies
Cycle: 31

X-ray binaries with high-mass (>8 solar) donors play a critical role in several high-stakes astrophysics questions, including the re-ionization of the universe and the nature of advanced-LIGO sources. Addressing these questions requires knowledge of high-mass X-ray binary (HMXB) demographics (their scaling with host SFR) and environments that are unattainable from current state-of-the-art studies of X-ray luminosity functions. We aim to produce the first homogeneous catalog of HMXBs by classifying bright, Chandra-detected X-ray point sources based on their optical counterparts in multi-band HST imaging. We focus on a sample of 8 nearby spiral galaxies with publicly available, high-fidelity compact cluster and OB association catalogs produced by the PHANGS-HST survey and complete Chandra Source Catalog coverage. The results of this investigation will enable us to address fundamental questions about HMXBs formation efficiency, age distribution, and natal kicks.