RELXILLNK: A Black Hole Relativistic Reflection Model for Testing General Relativity
Abstract
In this paper, we briefly present RELXILLNK, the first and currently only readily available model of the relativistic reflection spectrum of black hole accretion disks that includes non-Kerr solutions for the black hole spacetime, thus allowing for tests of the Kerr hypothesis and GR. RELXILLNK makes use of a general relativistic ray-tracing code to calculate the relativistic effects of any well-behaved, stationary, axisymmetric, and asymptotically flat black hole spacetime, while the disk physics is handled through the non-relativistic X-ray reflection code XILLVER. A number of different flavors are available within RELXILLNK; we summarize and compare these flavors using the Johannsen metric for the black hole spacetime.
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