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arXiv · 1703.07182

The Spin of the Supermassive Black Hole in MCG-05-23-16

Yu Wang·M. Ghasemi-Nodehi·Matteo Guainazzi·Cosimo Bambi
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Abstract

We present the results of a multi-epoch and multi-instrument study of the supermassive black hole at the center of the galaxy MCG-05-23-16 aiming at the determination of its spin. We have analyzed high quality X-ray data of MCG-05-23-16 from XMM-Newton, Suzaku, and NuSTAR obtained over a period of about 10~years. We have built a double-reflection spectral model that well describes the observed spectrum based on prior results suggesting that the iron K$\alpha$ line includes both a broad component from the disk's reflection spectrum and a narrow component due to fluorescence and scattering off material by more distant matter. Our measurement of the black hole spin parameter is $a_* = 0.856\pm0.006$ (99\% confidence level).

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Yu Wang, M. Ghasemi-Nodehi, Matteo Guainazzi, Cosimo Bambi. 2017-03-21. The Spin of the Supermassive Black Hole in MCG-05-23-16. https://arxiv.org/abs/1703.07182

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