What Compact-Object (Re)mergers Can Tell Us About Astrophysics


Kimball, C. (2022). What Compact-Object (Re)mergers Can Tell Us About Astrophysics. Perimeter Institute. https://pirsa.org/22040115


Kimball, Chase. What Compact-Object (Re)mergers Can Tell Us About Astrophysics. Perimeter Institute, Apr. 14, 2022, https://pirsa.org/22040115


          @misc{ pirsa_22040115,
            doi = {10.48660/22040115},
            url = {https://pirsa.org/22040115},
            author = {Kimball, Chase},
            keywords = {Strong Gravity},
            language = {en},
            title = {What Compact-Object (Re)mergers Can Tell Us About Astrophysics},
            publisher = {Perimeter Institute},
            year = {2022},
            month = {apr},
            note = {PIRSA:22040115 see, \url{https://pirsa.org}}

Chase Kimball Northwestern University

Talk Type Scientific Series


Among the discoveries in LIGO/Virgo/KAGRA's third observing run are a handful of compact binary coelescences (CBCs) that stand out for one reason or another -- exceptional either because they were the first entry in a previously undetected class of CBCs, or because of the mass, mass ratio, or spins of their component compact objects. After briefly discussing the implications of these observations and their merger rates, I will focus on the tension that has arisen from the discovery of the most massive binaries in LVK's catalog. These binaries have component black holes encroaching on the pair-instability mass gap, where black holes are not expected to be formed directly from stars. I'll discuss an alternate formation channel, where massive black holes are assembled dynamically from repeated binary black hole mergers, and an analysis that constructs a binary black hole population that allows for hierarchical formation in both globular cluster-like and nuclear star cluster-like environments.

Zoom Link: https://pitp.zoom.us/j/94867401133?pwd=bTJmVy8vUk9rb1RvTDlrMzl1ZHdEZz09