IPMU Colloquium

Speaker: Natasha Ivanova (Univ. of Alberta, Canada)
Title: Close Binary Stellar Evolution and Gravitational Wave Sources
Date (JST): Wed, Jan 22, 2020, 15:30 - 17:00
Place: Lecture Hall
Related File: 2425.pdf
Abstract: In the last four years, the Laser Interferometer Gravitational-Wave Observatory has announced a spectacular number of direct detections of gravitational waves originating from stellar-mass black holes. That revealed a previously unobserved population of merging stellar-mass black holes, which now grows continuously, with trigger alerts coming weekly. But how did these binaries form? The quest to answer has captured the imaginations of scientists of three schools of thought. I will review the three main competing ideas that can provide the formation of the detected black holes: through the common envelope events, as a result of the evolution of very fast rotating massive stars, and by dynamical stellar encounters in dense stellar systems.