Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
GR: Fachverband Gravitation und Relativitätstheorie
GR 12: GW V
GR 12.2: Vortrag
Donnerstag, 3. April 2025, 16:35–16:55, ZHG008
Subdominant multipole asymmetries in gravitational waves from binary black-hole mergers — •Jannik Mielke1,2, Shrobana Ghosh1,2, and Frank Ohme1,2 — 1Max Planck Institute for Gravitational Physics (Albert Einstein Institute), D-30167 Hannover, Germany — 2Leibniz University Hannover, D-30167 Hannover, Germany
In some binaries, the spins of the black holes are not aligned with the system’s orbital angular momentum. This causes the spins to precess and leads to an asymmetric emission of gravitational waves. Interestingly, multipole asymmetries which describe this asymmetric emission, are strongly related to the final kick of the remnant black hole and are the critical element in fully describing precession. Despite the astrophysical significance of kicks and precession, multipole asymmetries contribute only minimally to the overall signal strength. Consequently, the majority of current gravitational-wave models do not incorporate them. Moreover, the role of subdominant multipole asymmetries has not been investigated exhaustively. Therefore, this talk discusses the physics of multipole asymmetries, which I present through a systematic study of numerical relativity simulations. In addition, the importance of subdominant multipole asymmetries for the kick calculation will be demonstrated and I give a short outlook for their detectability with third generation detectors.
Keywords: gravitational waves; precession; binary black holes; multipole asymmetry; kick