We report the discovery of a Compton-thick (CT) dust-obscured galaxy (DOG) at z = 0.89, WISE J082501.48+300257.2 (WISE0825+3002), observed by Nuclear Spectroscopic Telescope Array (NuSTAR). X-ray analysis with the XCLUMPY model revealed that hard X-ray luminosity in the rest-frame 2-10 keV band of WISE0825+3002 is LX (2-10 keV) = 4.2−1.6+2.8×1044 erg s−1 while its hydrogen column density is NH = 1.0−0.4+0.8×1024 cm−2, indicating that WISE0825+3002 is a mildly CT active galactic nucleus (AGN). We performed the spectral energy distribution (SED) fitting with CIGALE to derive its stellar mass, star formation rate, and infrared luminosity. The estimated Eddington ratio based on stellar mass and integration of the best-fit SED of AGN component is λEdd = 0.70, which suggests that WISE0825+3002 harbors an actively growing black hole behind a large amount of gas and dust. We found that the relationship between luminosity ratio of X-ray and 6 μm, and Eddington ratio follows an empirical relation for AGNs reported by Toba et al. (2019a).
@article{arxiv.1911.04702,
title = {NuSTAR Discovery of a Compton-thick Dust-obscured Galaxy WISE J0825+3002},
author = {Yoshiki Toba and Satoshi Yamada and Yoshihiro Ueda and Claudio Ricci and Yuichi Terashima and Tohru Nagao and Wei-Hao Wang and Atsushi Tanimoto and Taiki Kawamuro},
journal= {arXiv preprint arXiv:1911.04702},
year = {2020}
}
Comments
10 pages, 7 figures, and 2 tables, accepted for publication in ApJ