Testing General Relativity with Accretion-Flow Imaging of Sgr A *
Broderick, Avery E.
Doeleman, Sheperd S.
Fish, Vincent L.
MetadataShow full item record
CitationJohannsen, Tim, Carlos Wang, Avery E. Broderick, Sheperd S. Doeleman, Vincent L. Fish, Abraham Loeb, and Dimitrios Psaltis. 2016. “Testing General Relativity with Accretion-Flow Imaging of SgrA*.” Physical Review Letters 117 (9). https://doi.org/10.1103/physrevlett.117.091101.
AbstractThe 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 degrees, the position angle to within 0.04 degrees, and the quadrupolar deviation to within 0.005 at 3 sigma confidence. Thus, we are entering an era of high-precision strong gravity measurements.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41412217
- FAS Scholarly Articles