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Ergoregion instability of ultracompact astrophysical objects
Open accessAbstract
Most of the properties of black holes can be mimicked by horizonless compact objects such as gravastars and boson stars. We show that these ultracompact objects develop a strong ergoregion instability when rapidly spinning. Instability time scales can be of the order of 0.1 seconds to 1 week for objects with mass $M=1\ensuremath{-}{10}^{6}{M}_{\ensuremath{\bigodot}}$ and angular momentum $J>0.4{M}^{2}$. This provides a strong indication that ultracompact objects with large rotation are black holes. Explosive events due to ergoregion instability have a well-defined gravitational-wave signature. These events could be detected by next-generation gravitational-wave detectors such as Advanced LIGO or LISA.
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Cites
Black holes in general relativity
Hawking, S. W. (1972) · Communications in Mathematical Physics · doi:10.1007/bf01877517 · Cited by 1,561
Floating Orbits, Superradiant Scattering and the Black-hole Bomb
PRESS, W. H., & TEUKOLSKY, S. A. (1972) · Nature · doi:10.1038/238211a0 · Cited by 729
Cited by
Is the Gravitational-Wave Ringdown a Probe of the Event Horizon?
Cardoso, V., Franzin, E., & Pani, P. (2016) · Physical Review Letters · doi:10.1103/physrevlett.116.171101 · Cited by 819
Self-citationEchoes from the abyss: Tentative evidence for Planck-scale structure at black hole horizons
Abedi, J., Dykaar, H., & Afshordi, N. (2017) · Physical Review D · doi:10.1103/physrevd.96.082004 · Cited by 409
Liebling, S. L., & Palenzuela, C. (2017) · Living Reviews in Relativity · doi:10.1007/s41114-017-0007-y · Cited by 371
Cardoso, V., Crispino, L. C. B., Macedo, C. F. B., Okawa, H., & Pani, P. (2014) · Physical Review D · doi:10.1103/physrevd.90.044069 · Cited by 309
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Metadata
- Authors
- Cardoso, V., Pani, P., Cadoni, M., & Cavaglià, M.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2008-06-26
- Volume
- 77
- Issue
- 12
- ISSN
- 0556-2821 (ISSN-L)
- 1550-7998
- 1550-2368
- OpenAlex
- W2154217747
- Cited by
- 186
- References
- 2
- FWCI
- 3.34
- Type
- journal article
- Language
- en
- Open access
- green
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- Cardoso, V., Pani, P., Cadoni, M., & Cavaglià, M. (2008). Ergoregion instability of ultracompact astrophysical objects. Physical Review D. https://doi.org/10.1103/physrevd.77.124044
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