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  Alternative possibility of GW190521: Gravitational waves from high-mass black hole-disk systems

Shibata, M., Kiuchi, K., Fujibayashi, S., & Sekiguchi, Y. (2021). Alternative possibility of GW190521: Gravitational waves from high-mass black hole-disk systems. Physical Review D, 103(6): 063037. doi:10.1103/PhysRevD.103.063037.

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 Creators:
Shibata, Masaru1, Author              
Kiuchi, Kenta1, Author              
Fujibayashi, Sho1, Author              
Sekiguchi, Yuichiro, Author
Affiliations:
1Computational Relativistic Astrophysics, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_2541714              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: We evolve high-mass disks of mass $15-50M_\odot$ orbiting a $50M_\odot$ spinning black hole in the framework of numerical relativity. Such high-mass systems could be an outcome during the collapse of rapidly-rotating very-massive stars. The massive disks are dynamically unstable to the so-called one-armed spiral-shape deformation with the maximum fractional density-perturbation of $\delta \rho/\rho \gtrsim 0.1$, and hence, high-amplitude gravitational waves are emitted. The waveforms are characterized by an initial high-amplitude burst with the frequency of $\sim 40-50$ Hz and the maximum amplitude of $(1-10)\times 10^{-22}$ at the hypothetical distance of 100 Mpc and by a subsequent low-amplitude quasi-periodic oscillation. We illustrate that the waveforms in our models with a wide range of the disk mass resemble that of GW190521. We also point out that gravitational waves from rapidly-rotating very-massive stars can be the source for 3rd-generation gravitational-wave detectors for exploring the formation process of rapidly-rotating high-mass black holes of mass $\sim 50-100M_\odot$ in an early universe.

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 Dates: 2021-01-132021
 Publication Status: Published in print
 Pages: 14 pages, 7 figures. Submitted to PRD
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 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2101.05440
DOI: 10.1103/PhysRevD.103.063037
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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: 103 (6) Sequence Number: 063037 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258