Testing General Relativity with the Reflection Spectrum of the Supermassive Black Hole in 1H0707-495
Recently, we have extended the x-ray reflection model RELXILL to test the spacetime metric in the strong gravitational field of astrophysical black holes. In the present Letter, we employ this extended model to analyze XMM-Newton, NuSTAR, and Swift data of the supermassive black hole in 1H0707-495 and test deviations from a Kerr metric parametrized by the Johannsen deformation parameter α_(13). Our results are consistent with the hypothesis that the spacetime metric around the black hole in 1H0707-495 is described by the Kerr solution.
Additional Information© 2018 American Physical Society. Received 30 August 2017; revised manuscript received 12 January 2018; published 1 February 2018. Z. C. thanks the Cahill Center for Astronomy and Astrophysics at Caltech for hospitality during his visit where part of this work was done. The work of Z. C., S. N., and C. B. was supported by the National Natural Science Foundation of China (Grant No. U1531117) and Fudan University (Grant No. IDH1512060). C. B. and J. A. G. acknowledge support from the Alexander von Humboldt Foundation.
Published - PhysRevLett.120.051101.pdf
Submitted - 1709.00219.pdf
Supplemental Material - suppl_v4.pdf