Testing General Relativity with Accretion-Flow Imaging of SgrA*
The Event Horizon Telescope is a global, very long baseline interferometer capable of probing potential deviations from the Kerr metric, which is believed to provide the unique description of astrophysical black holes. Here, we report an updated constraint on the quadrupolar deviation of Sagittarius...
| Main Authors: | , , , , , , |
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| Format: | Article |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/116616 |
| _version_ | 1826196572694642688 |
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| author | Johannsen, Tim Wang, Carlos Broderick, Avery E. Loeb, Abraham Psaltis, Dimitrios Doeleman, Sheperd Samuel Fish, Vincent L. |
| author2 | Haystack Observatory |
| author_facet | Haystack Observatory Johannsen, Tim Wang, Carlos Broderick, Avery E. Loeb, Abraham Psaltis, Dimitrios Doeleman, Sheperd Samuel Fish, Vincent L. |
| author_sort | Johannsen, Tim |
| collection | MIT |
| description | The Event Horizon Telescope is a global, very long baseline interferometer capable of probing potential deviations from the Kerr metric, which is believed to provide the unique description of astrophysical black holes. Here, we report an updated constraint on the quadrupolar deviation of Sagittarius A∗ within the context of a radiatively inefficient accretion flow model in a quasi-Kerr background. We also simulate near-future constraints obtainable by the forthcoming eight-station array and show that in this model already a one-day observation can measure the spin magnitude to within 0.005, the inclination to within 0.09°, the position angle to within 0.04°, and the quadrupolar deviation to within 0.005 at 3σ confidence. Thus, we are entering an era of high-precision strong gravity measurements. |
| first_indexed | 2024-09-23T10:29:14Z |
| format | Article |
| id | mit-1721.1/116616 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:29:14Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1166162022-09-30T21:29:25Z Testing General Relativity with Accretion-Flow Imaging of SgrA* Johannsen, Tim Wang, Carlos Broderick, Avery E. Loeb, Abraham Psaltis, Dimitrios Doeleman, Sheperd Samuel Fish, Vincent L. Haystack Observatory Massachusetts Institute of Technology. Department of Physics Doeleman, Sheperd Samuel Fish, Vincent L. The Event Horizon Telescope is a global, very long baseline interferometer capable of probing potential deviations from the Kerr metric, which is believed to provide the unique description of astrophysical black holes. Here, we report an updated constraint on the quadrupolar deviation of Sagittarius A∗ within the context of a radiatively inefficient accretion flow model in a quasi-Kerr background. We also simulate near-future constraints obtainable by the forthcoming eight-station array and show that in this model already a one-day observation can measure the spin magnitude to within 0.005, the inclination to within 0.09°, the position angle to within 0.04°, and the quadrupolar deviation to within 0.005 at 3σ confidence. Thus, we are entering an era of high-precision strong gravity measurements. 2018-06-26T14:45:56Z 2018-06-26T14:45:56Z 2018-06-26 2018-06-26T12:34:52Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/116616 Johannsen, Tim et al. “Testing General Relativity with Accretion-Flow Imaging of SgrA*.” Physical Review Letters 117, 9 (August 2016): 091101 © 2016 American Physical Society http://dx.doi.org/10.1103/PhysRevLett.117.091101 Physical Review Letters 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. application/pdf American Physical Society APS |
| spellingShingle | Johannsen, Tim Wang, Carlos Broderick, Avery E. Loeb, Abraham Psaltis, Dimitrios Doeleman, Sheperd Samuel Fish, Vincent L. Testing General Relativity with Accretion-Flow Imaging of SgrA* |
| title | Testing General Relativity with Accretion-Flow Imaging of SgrA* |
| title_full | Testing General Relativity with Accretion-Flow Imaging of SgrA* |
| title_fullStr | Testing General Relativity with Accretion-Flow Imaging of SgrA* |
| title_full_unstemmed | Testing General Relativity with Accretion-Flow Imaging of SgrA* |
| title_short | Testing General Relativity with Accretion-Flow Imaging of SgrA* |
| title_sort | testing general relativity with accretion flow imaging of sgra |
| url | http://hdl.handle.net/1721.1/116616 |
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