Past Event

Eccentric Mergers in AGN Disks: Influence of the Supermassive Black-Hole on Three-body Interactions

April 11, 2024
4:35 PM - 5:05 PM
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Pupin 1402

Seminar by Gaia Fabj, Niels Bohr Institute

There are indications that stellar-origin black holes (BHs) are efficiently paired up in binary black holes (BBHs) in Active Galactic Nuclei (AGN) disk environments, which can undergo interactions with single BHs in the disk. Such binary-single interactions can potentially lead to an exceptionally high fraction of gravitational-wave mergers with measurable eccentricity in LIGO/Virgo/KAGRA. In this talk I will present results obtained by performing post-Newtonian N-body simulations between migrating BBHs and single BHs set in an AGN disc-like configuration with a consistent inclusion of the central supermassive black hole (SMBH) in the equations of motion. With this setup, we study how the fraction of eccentric mergers varies in terms of the initial size of the BBH semi-major axis relative to the Hill sphere, as well as how it depends on the angle between the BBH and the incoming single BH.

Host: Chengcheng Xin