Shanghai Astronomical Observatory Astrophysics Colloquium

Title：Ways of Probing the Assembly Mechanism of Individual Black Hole Binary Mergers

Speaker: Johan Samsing (Niels Bohr Institute）

Time：1:00 pm Apr.10th (Thursday)

Tencent Meeting：841-606-199 password: 6360

Location: Lecture Hall, 3rd floor

Abstract：

I will illustrate how different binary black hole (BBH) merger formation channels give rise to phase shifts, or modulations, in the GW signal that can be used to infer the origin of individual BBH mergers. I will in particular describe the case of GW phase shifts arising from chaotic triple BH scatterings that are known to take place in stellar clusters. New ideas on GW phase shifts in strong lensing events will also be presented. Modeling, quantifying and looking for GW modulations will start to play a key-role in the coming years when the GW sensitivity goes up and might be the only way of determining the origin of GW events case-by-case.

CV：

Johan Samsing. PhD 2014 from Niels Bohr Institute. 2014-2017 Einstein Fellow at Princeton University. 2017-2019 Spitzer Fellow. 2019-... Assistant Prof. Niels Bohr Institute.

2020-2027 Villum Young Investigator. 2022-2027 ERC Starting Grant Group Leader. Recent Prize: MERAC Prize for "Best Early Career Researcher" in Theoretical Astrophysics fromthe European Astronomical Union.

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