Ringdown frequencies in black holes formed from precessing black-hole binaries

被引：8

作者：

Hamilton, Eleanor ^{[1
]}

London, Lionel ^{[2
,3
,4
,5
]}

Hannam, Mark ^{[6
]}

机构：

[1] Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland

[2] Kings Coll London, London WC2R 2LS, England

[3] Univ Amsterdam, Inst High Energy Phys, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[4] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave,37-664H, Cambridge, MA 02139 USA

[5] LIGO Lab, 77 Massachusetts Ave,37-664H, Cambridge, MA 02139 USA

[6] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales

来源：

PHYSICAL REVIEW D | 2023年 / 107卷 / 10期

基金：

美国国家科学基金会; 英国科学技术设施理事会; 欧洲研究理事会; 瑞士国家科学基金会;

关键词：

SPIN;

D O I：

10.1103/PhysRevD.107.104035

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a simple formula for the effective ringdown frequencies of the gravitational-wave signal of a precessing black-hole binary in the coprecessing frame. This formula requires only knowledge of the quasi -normal mode frequencies of the system and the value of the precession angle beta during ringdown. Such a formula will be useful in modeling precessing systems. We also provide a comprehensive description of the oscillations in the ringdown frequency in an inertial frame where the spin of the final black hole is in the z -direction. These oscillations arise due to the superposition of the prograde and retrograde frequencies. Our understanding of these oscillations can be used to extract the ratio of the amplitudes of the prograde and retrograde frequencies from numerical data. Alternatively, knowledge of this ratio of the amplitudes can be used to produce a simple model of the time-domain oscillations in the ringdown frequency.

引用

页数：17

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