Tidal heating as a discriminator for horizons in extreme mass ratio inspirals
The defining feature of a classical black hole is being a perfect absorber. Any evidence showing otherwise would indicate a departure from the standard black-hole picture. Energy and angular momentum absorption by the horizon of a black hole is responsible for tidal heating in a binary. This effect...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society (APS)
2020
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| Online Access: | https://hdl.handle.net/1721.1/125465 |
| _version_ | 1826202593760641024 |
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| author | Datta, Sayak Brito, Richard Bose, Sukanta Pani, Paolo Hughes, Scott A |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Datta, Sayak Brito, Richard Bose, Sukanta Pani, Paolo Hughes, Scott A |
| author_sort | Datta, Sayak |
| collection | MIT |
| description | The defining feature of a classical black hole is being a perfect absorber. Any evidence showing otherwise would indicate a departure from the standard black-hole picture. Energy and angular momentum absorption by the horizon of a black hole is responsible for tidal heating in a binary. This effect is particularly important in the latest stages of an extreme mass ratio inspiral around a spinning supermassive object, one of the main targets of the future LISA mission. We study how this effect can be used to probe the nature of supermassive objects in a model independent way. We compute the orbital dephasing and the gravitational-wave signal emitted by a point particle in circular, equatorial motion around a spinning supermassive object to the leading order in the mass ratio. Absence of absorption by the central object can affect the gravitational-wave signal dramatically, especially at high spin. This effect will make it possible to put an unparalleled upper bound on the reflectivity of exotic compact objects, at the level of O(0.01)%. This stringent bound would exclude the possibility of observing echoes in the ringdown of a supermassive binary merger. |
| first_indexed | 2024-09-23T12:10:07Z |
| format | Article |
| id | mit-1721.1/125465 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:10:07Z |
| publishDate | 2020 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1254652022-09-28T00:40:06Z Tidal heating as a discriminator for horizons in extreme mass ratio inspirals Datta, Sayak Brito, Richard Bose, Sukanta Pani, Paolo Hughes, Scott A Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research The defining feature of a classical black hole is being a perfect absorber. Any evidence showing otherwise would indicate a departure from the standard black-hole picture. Energy and angular momentum absorption by the horizon of a black hole is responsible for tidal heating in a binary. This effect is particularly important in the latest stages of an extreme mass ratio inspiral around a spinning supermassive object, one of the main targets of the future LISA mission. We study how this effect can be used to probe the nature of supermassive objects in a model independent way. We compute the orbital dephasing and the gravitational-wave signal emitted by a point particle in circular, equatorial motion around a spinning supermassive object to the leading order in the mass ratio. Absence of absorption by the central object can affect the gravitational-wave signal dramatically, especially at high spin. This effect will make it possible to put an unparalleled upper bound on the reflectivity of exotic compact objects, at the level of O(0.01)%. This stringent bound would exclude the possibility of observing echoes in the ringdown of a supermassive binary merger. NSF Grant No. PHY-1707549 ASA Grant No. 80NSSC18K1091 2020-05-26T20:50:31Z 2020-05-26T20:50:31Z 2020-02 2019-10 2020-02-05T15:03:28Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 https://hdl.handle.net/1721.1/125465 Datta, Sayak, et al. "Tidal heating as a discriminator for horizons in extreme mass ratio inspirals." Physical Review D, 101, 4, (February 2020): 044004. © 2020 American Physical Society en http://dx.doi.org/10.1103/PhysRevD.101.044004 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society (APS) American Physical Society |
| spellingShingle | Datta, Sayak Brito, Richard Bose, Sukanta Pani, Paolo Hughes, Scott A Tidal heating as a discriminator for horizons in extreme mass ratio inspirals |
| title | Tidal heating as a discriminator for horizons in extreme mass ratio inspirals |
| title_full | Tidal heating as a discriminator for horizons in extreme mass ratio inspirals |
| title_fullStr | Tidal heating as a discriminator for horizons in extreme mass ratio inspirals |
| title_full_unstemmed | Tidal heating as a discriminator for horizons in extreme mass ratio inspirals |
| title_short | Tidal heating as a discriminator for horizons in extreme mass ratio inspirals |
| title_sort | tidal heating as a discriminator for horizons in extreme mass ratio inspirals |
| url | https://hdl.handle.net/1721.1/125465 |
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