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arXiv · 1702.00073

Evidence for Relativistic Disk Reflection in the Seyfert 1h Galaxy/ULIRG IRAS 05189-2524 Observed by NuSTAR and XMM-Newton

Yanjun Xu·Mislav Balokovic·Dominic J. Walton·Fiona A. Harrison·Javier A. Garcia·Michael J. Koss
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Abstract

We present a spectral analysis of the NuSTAR and XMM-Newton observations of the Seyfert 1h galaxy/ULIRG IRAS 05189-2524 taken in 2013. We find evidence for relativistic disk reflection in the broadband X-ray spectrum: a highly asymmetric broad Fe K$α$ emission line extending down to 3 keV and a Compton scattering component above 10 keV. Physical modeling with a self-consistent disk reflection model suggests the accretion disk is viewed at an intermediate angle with a super-solar iron abundance, and a mild constraint can be put on the high-energy cutoff of the power-law continuum. We test the disk reflection modeling under different absorption scenarios. A rapid black hole (BH) spin is favored, however we cannot place a model-independent tight constraint on the value. The high reflection fraction ($R_{\rm ref} \simeq$ 2.0-3.2) suggests the coronal illuminating source is compact and close to the BH (lying within 8.7 $R_{\rm g}$ above the central BH), where light-bending effects are important.

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Yanjun Xu, Mislav Balokovic, Dominic J. Walton, Fiona A. Harrison, Javier A. Garcia, Michael J. Koss. 2017-01-31. Evidence for Relativistic Disk Reflection in the Seyfert 1h Galaxy/ULIRG IRAS 05189-2524 Observed by NuSTAR and XMM-Newton. https://doi.org/10.3847/1538-4357%2Faa5df4

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