Satoshi YAMADA
(Kyoto University)
We have analyzed broadband (0.4-70 keV) X-ray spectra of the luminous infrared galaxy (LIRG) Mrk 463 observed with NuSTAR, Chandra, and XMM-Newton. The object contains double nucleus (Mrk 463e and Mrk 463w) with a spatial separation of ~3.8 kpc, whose spectra can be separated by using the Chandra data. We find that both AGNs are heavily obscured with hydrogen column densities of 8 x 10^23 and 3 x 10^23 cm^-2, respectively. The luminosity ratio between X-ray (2-10 keV) to [O IV] 26um of Mrk 463e is smaller than that of normal Seyfert galaxies by an order of magnitude, suggesting that the black hole is rapidly growing but is not deeply "buried" by circumnuclear dust unlike the case of UGC 5101 (Oda et al. 2017).