Title: Binary-Single Encounters as Random Walks and Dynamical Formation of Gravitational-Wave Sources

Abstract: Chaotic three-body interactions are a dynamical pathway of gravitational-wave source production. Any such encounter terminates when one of the three stars is ejected to infinity, leaving behind a remnant binary; the problem of binary-single star-scattering consists of finding the probability distribution of the orbital parameters of the remnant binary, as a function of the total energy and the total angular momentum. We model the encounter as a series of close, non-hierarchical, triple approaches, interspersed with hierarchical phases, in which the system consists of an inner binary and a star that orbits it -- this turns the evolution of the entire encounter to a random walk between consecutive hierarchical phases. We generalise the study to account for dissipative processes, such as tides and gravitational-wave emission. If time permits I will also describe on-going work about generalisations to the 4-body problem.

──────────

Emanuele Sobacchi is inviting you to a scheduled Zoom meeting.

Join Zoom Meeting
https://huji.zoom.us/j/88687146347?pwd=Q05mcGdhWHQrcWQ3SDBaNEovYW45UT09

Meeting ID: 886 8714 6347
Passcode: 069935
One tap mobile
+97223764510,,88687146347#,,,,*069935# Israel
+97239786688,,88687146347#,,,,*069935# Israel

Dial by your location
        +972 2 376 4510 Israel
        +972 3 978 6688 Israel
        +972 2 376 4509 Israel
Meeting ID: 886 8714 6347
Passcode: 069935
Find your local number: https://huji.zoom.us/u/k51QSyGVT

Join by Skype for Business
https://huji.zoom.us/skype/88687146347



──────────