2019/04/18 by Atsushi Tanimoto, Yoshihiro Ueda, Hirokazu Odaka +3 · 1 citation
Physics and Astronomy · #astro-ph.HE #astro-ph.GA
paper · pdf · doi:10.3847/1538-4357/ab1b20
20 pages, 11 figures, accepted for publication in ApJ
arxiv created 2019/04/18 · arxiv updated 2020/01/08
We construct an X-ray spectral model from the clumpy torus in an active galactic nucleus (AGN), designated as "XCLUMPY", utilizing the Monte Carlo simulation for Astrophysics and Cosmology framework (MONACO: Odaka et al. 2011, 2016). The adopted geometry of the torus is the same as that in Nenkova et al. (2008), who assume a power law distribution of clumps in the radial direction and a normal distribution in the elevation direction. We investigate the dependence of the X-ray continuum and Fe Kα fluorescence line profile on the torus parameters. Our model is compared with other torus models: MYTorus model (Murphy & Yaqoob 2009), Ikeda model (Ikeda et al. 2009), and CTorus model (Liu & Li 2014). As an example, we also present the results applied to the broadband X-ray spectra of the Circinus galaxy observed with XMM-Newton, Suzaku, and NuSTAR. Our model can well reproduce the data, yielding a hydrogen column density along the equatorial plane NHEqu = 9.08-0.08+0.14 × 1024 cm-2, a torus angular width σ= 14.7-0.39+0.44 degree, and a 2--10 keV luminosity log L2-10/\mathrmerg s-1 = 42.8. These results are discussed in comparison with the observations in other wavelengths.