Testing General Relativity with Accretion-Flow Imaging of Sgr A^{*}.

Johannsen, Tim; Wang, Carlos; Broderick, Avery E; Doeleman, Sheperd S; Fish, Vincent L; Loeb, Abraham; Psaltis, Dimitrios

dc.contributor.author	Johannsen, Tim
dc.contributor.author	Wang, Carlos
dc.contributor.author	Broderick, Avery E
dc.contributor.author	Doeleman, Sheperd S
dc.contributor.author	Fish, Vincent L
dc.contributor.author	Loeb, Abraham
dc.contributor.author	Psaltis, Dimitrios
dc.date.accessioned	2016-11-10T03:32:19Z
dc.date.available	2016-11-10T03:32:19Z
dc.date.issued	2016-08-26
dc.identifier.citation	Testing General Relativity with Accretion-Flow Imaging of Sgr A^{*}. 2016, 117 (9):091101 Phys. Rev. Lett.	en
dc.identifier.issn	1079-7114
dc.identifier.pmid	27610837
dc.identifier.doi	10.1103/PhysRevLett.117.091101
dc.identifier.uri	http://hdl.handle.net/10150/621316
dc.description.abstract	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.
dc.description.sponsorship	CITA National Fellowship at the University of Waterloo; Perimeter Institute for Theoretical Physics; Natural Sciences and Engineering Research Council of Canada; Government of Canada through Industry Canada; Province of Ontario through the Ministry of Research and Innovation; National Science Foundation; Gordon and Betty Moore Foundation [GBMF-3561]	en
dc.language.iso	en	en
dc.publisher	AMER PHYSICAL SOC	en
dc.relation.url	http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.091101	en
dc.rights	© 2016 American Physical Society.	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/
dc.title	Testing General Relativity with Accretion-Flow Imaging of Sgr A^{*}.	en
dc.type	Article	en
dc.contributor.department	Univ Arizona, Dept Astron	en
dc.identifier.journal	Physical review letters	en
dc.description.note	The right to use all or part of the Article, including the APS-prepared version without revision or modification, on the author(s)’ web home page or employer’s website and to make copies of all or part of the Article, including the APS-prepared version without revision or modification, for the author(s)’ and/or the employer’s use for educational or research purposes.	en
dc.description.collectioninformation	This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.	en
dc.eprint.version	Final published version	en
refterms.dateFOA	2018-06-16T20:55:11Z
html.description.abstract	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.