Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits
In a previous paper, we developed tools for studying the horizon geometry of a Kerr black hole that is tidally distorted by a binary companion using techniques that require large mass ratios but can be applied to any bound orbit and allow for arbitrary black hole spin. We now apply these tools to ge...
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/110495 https://orcid.org/0000-0003-2492-6505 https://orcid.org/0000-0001-6211-1388 |
| _version_ | 1826217035862900736 |
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| author | O'Sullivan, Stephen Gerard Hughes, Scott A |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics O'Sullivan, Stephen Gerard Hughes, Scott A |
| author_sort | O'Sullivan, Stephen Gerard |
| collection | MIT |
| description | In a previous paper, we developed tools for studying the horizon geometry of a Kerr black hole that is tidally distorted by a binary companion using techniques that require large mass ratios but can be applied to any bound orbit and allow for arbitrary black hole spin. We now apply these tools to generic Kerr black hole orbits. This allows us to investigate horizon dynamics: the tidal field perturbing the horizon’s geometry varies over a generic orbit, with significant variations for eccentric orbits. Many of the features of the horizon’s behavior found previously carry over to the dynamical case in a natural way. In particular, we find significant offsets between the applied tide and the horizon’s response. This leads to bulging in the horizon’s geometry which can lag or lead the orbit, depending upon the hole’s rotation and the orbit’s geometry. An interesting and apparently new feature we find are small-amplitude, high-frequency oscillations in the horizon’s response. We have not been able to identify a mechanism for producing these oscillations but find that they appear most clearly when rapidly rotating black holes are distorted by very strong-field orbits. |
| first_indexed | 2024-09-23T16:57:03Z |
| format | Article |
| id | mit-1721.1/110495 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:57:03Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1104952022-09-29T22:36:32Z Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits O'Sullivan, Stephen Gerard Hughes, Scott A Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research O'Sullivan, Stephen Gerard Hughes, Scott A In a previous paper, we developed tools for studying the horizon geometry of a Kerr black hole that is tidally distorted by a binary companion using techniques that require large mass ratios but can be applied to any bound orbit and allow for arbitrary black hole spin. We now apply these tools to generic Kerr black hole orbits. This allows us to investigate horizon dynamics: the tidal field perturbing the horizon’s geometry varies over a generic orbit, with significant variations for eccentric orbits. Many of the features of the horizon’s behavior found previously carry over to the dynamical case in a natural way. In particular, we find significant offsets between the applied tide and the horizon’s response. This leads to bulging in the horizon’s geometry which can lag or lead the orbit, depending upon the hole’s rotation and the orbit’s geometry. An interesting and apparently new feature we find are small-amplitude, high-frequency oscillations in the horizon’s response. We have not been able to identify a mechanism for producing these oscillations but find that they appear most clearly when rapidly rotating black holes are distorted by very strong-field orbits. National Science Foundation (U.S.) (PHY-1403261) 2017-07-06T17:39:06Z 2017-07-06T17:39:06Z 2016-08 2015-05 2016-08-29T22:00:03Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 http://hdl.handle.net/1721.1/110495 O’Sullivan, Stephen and Hughes, Scott A. "Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits." Physical Review D 94, 044057 (August 2016): 1-24 © 2016 American Physical Society https://orcid.org/0000-0003-2492-6505 https://orcid.org/0000-0001-6211-1388 en http://dx.doi.org/10.1103/PhysRevD.94.044057 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 American Physical Society |
| spellingShingle | O'Sullivan, Stephen Gerard Hughes, Scott A Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits |
| title | Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits |
| title_full | Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits |
| title_fullStr | Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits |
| title_full_unstemmed | Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits |
| title_short | Strong-field tidal distortions of rotating black holes. II. Horizon dynamics from eccentric and inclined orbits |
| title_sort | strong field tidal distortions of rotating black holes ii horizon dynamics from eccentric and inclined orbits |
| url | http://hdl.handle.net/1721.1/110495 https://orcid.org/0000-0003-2492-6505 https://orcid.org/0000-0001-6211-1388 |
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