Theoretical Perspectives on Probing Black Hole Population with Astrometric Satellite Gaia

Explore a detailed lecture from the University of Tokyo's Minori Shikauchi examining how the Gaia astrometric satellite can detect black hole-luminous companion (BH-LC) binaries through observation of sinusoidal motion. Learn about the unique capabilities of Gaia to detect BH-LC binaries with longer orbital periods compared to both Milky Way black hole X-ray binaries and gravitational wave-detected extragalactic binary black holes. Discover theoretical estimates suggesting several to tens of BH-LC binary detections during Gaia's five-year observation period, along with key implications for future astronomical observations and our understanding of black hole populations.