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Small mass plunging into a Kerr black hole: Anatomy of the inspiral-merger-ringdown waveforms

Taracchini, A., Buonanno, A., Khanna, G., & Hughes, S. A. (2014). Small mass plunging into a Kerr black hole: Anatomy of the inspiral-merger-ringdown waveforms. Physical Review D, 90: 084025. doi:10.1103/PhysRevD.90.084025.

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Creators:
Taracchini, Andrea, Author
Buonanno, A.1, Author
Khanna, Gaurav, Author
Hughes, Scott A., Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
Abstract: We numerically solve the Teukolsky equation in the time domain to obtain the gravitational-wave emission of a small mass inspiraling and plunging into the equatorial plane of a Kerr black hole. We account for the dissipation of orbital energy using the Teukolsky frequency-domain gravitational-wave fluxes for circular, equatorial orbits, down to the light-ring. We consider Kerr spins $-0.99 \leq q \leq 0.99$, and compute the inspiral-merger-ringdown (2,2), (2,1), (3,3), (3,2), (4,4), and (5,5) modes. We study the large-spin regime, and find a great simplicity in the merger waveforms, thanks to the extremely circular character of the plunging orbits. We also quantitatively examine the mixing of quasinormal modes during the ringdown, which induces complicated amplitude and frequency modulations in the waveforms. Finally, we explain how the study of small mass-ratio black-hole binaries helps extending effective-one-body models for comparable-mass, spinning black-hole binaries to any mass ratio and spin magnitude.

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Dates: 2014-04-072014
Publication Status: Published in print
Pages: 20 pages, 15 figures
Publishing info: -
Rev. Method: -
Identifiers: arXiv: 1404.1819
DOI: 10.1103/PhysRevD.90.084025
Degree: -

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Title: Physical Review D
Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 90 Sequence Number: 084025 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258