English

Application of X-Ray Clumpy Torus Model (XCLUMPY) to 10 Obscured Active Galactic Nuclei Observed with Suzaku and NuSTAR

High Energy Astrophysical Phenomena 2020-07-08 v1 Astrophysics of Galaxies

Abstract

We apply XCLUMPY, an X-ray spectral model from a clumpy torus in an active galactic nucleus (AGN), to the broadband X-ray spectra of 10 obscured AGNs observed with both Suzaku and NuSTAR. The infrared spectra of these AGNs were analyzed with the CLUMPY code. Since XCLUMPY adopts the same clump distribution as that in the CLUMPY, we can directly compare the torus parameters obtained from the X-ray spectra and those from the infrared ones. The torus angular widths determined from the infrared spectra (σIR\sigma_{\mathrm{IR}}) are systematically larger than those from the X-ray data (σX\sigma_{\mathrm{X}}); the difference (σIRσX\sigma_{\mathrm{IR}}-\sigma_{\mathrm{X}}) correlates with the inclination angle determined from the X-ray spectrum. These results can be explained by the contribution from dusty polar outflows to the observed infrared flux, which becomes more significant at higher inclinations (more edge-on views). The ratio of the hydrogen column density and V-band extinction in the line of sight absorber shows large scatter (\simeq1 dex) around the Galactic value, suggesting that a significant fraction of AGNs have dust-rich circumnuclear environments.

Keywords

Cite

@article{arxiv.2005.12927,
  title  = {Application of X-Ray Clumpy Torus Model (XCLUMPY) to 10 Obscured Active Galactic Nuclei Observed with Suzaku and NuSTAR},
  author = {Atsushi Tanimoto and Yoshihiro Ueda and Hirokazu Odaka and Shoji Ogawa and Satoshi Yamada and Toshihiro Kawaguchi and Kohei Ichikawa},
  journal= {arXiv preprint arXiv:2005.12927},
  year   = {2020}
}

Comments

17 pages, 3 figures, accepted for publication in ApJ