2016/08/07 by Lior M. Burko, Gaurav Khanna · 17 citations
Physics and Astronomy · #Accretion (finance) #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Black Holes and Theoretical Physics #Black hole (networking) #Computer science #Gravitational wave #Physics #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Rotating black hole #gr-qc
paper · pdf · doi:10.1103/physrevd.94.084049
published in Physical review. D/Physical review. D. 94(8) (American Physical Society) · 7 pages, 9 figures
arxiv created 2016/08/07 · openalex publication_date 2016/10/27 · arxiv updated 2016/11/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We study numerically in the time domain the linearized gravitational waves emitted from a plunge into a nearly extremal Kerr black hole by solving the inhomogeneous Teukolsky equation. We consider spinning black holes for which the specific spin angular momentum a/M=1\ensuremath-\ensuremathε, and we consider values of \ensuremathε\ensuremath≥10^\ensuremath-6. We find an effective transient behavior for the quasinormal ringdown: the early phase of the quasinormal ringdown is governed by a decay according to inverse time, with frequency equaling twice the black hole's horizon frequency. The smaller \ensuremathε is, the later the transition from this transient inverse-time decay to exponential decay. Such sources, if they exist, may be interesting potential sources for terrestrial or space-borne gravitational-wave observatories.