Relativistic reflection spectra of super-spinning black holes
Tripathi, Ashutosh; Zhou, Biao; Abdikamalov, Askar B.; Ayzenberg, Dimitry; Bambi, Cosimo; Nampalliwar, Sourabh; Zhou, Menglei
China, Germany
Abstract
We construct a relativistic reflection model in a non-Kerr spacetime in which, depending on the value of the deformation parameter of the metric, there are black hole solutions with spin parameter | a∗|>1 . We apply our model to fit Suzaku data of four Seyfert galaxies (Ton S180, Ark 120, 1H0419-577, and Swift J0501.9-3239). These galaxies host at the center supermassive black holes that were previously interpreted as near-extremal Kerr black holes. For Ton S180 and 1H0419-577, our measurements are still consistent with the Kerr hypothesis. For Ark 120 and Swift J0501.9-3239, the Kerr solution is not recovered at 3-σ . We discuss our results and possible systematic uncertainties in the model.