Torus Constraints in ANEPD-CXO245: A Compton-thick AGN with Double-peaked Narrow Lines
Goto, Tomotsugu; Burgarella, Denis; Tanimoto, Atsushi; Ueda, Yoshihiro; Pearson, Chris; Barrufet, Laia; Matsuhara, Hideo; Malkan, Matthew; Oi, Nagisa; Toba, Yoshiki; Matsuura, Shuji; White, Glenn J.; Krumpe, Mirko; Takagi, Toshinobu; Hanami, Hitoshi; Miyaji, Takamitsu; Herrera-Endoqui, Martín; Ishigaki, Tsuyoshi; Brunner, Hermann; Hanzawa, Masaki; Shogaki, Ayano
Mexico, Germany, Japan, Spain, Taiwan, United Kingdom, France, United States
Abstract
We report on the torus constraints of the Compton-thick active galactic nucleus (AGN) with double-peaked optical narrow-line region emission lines, ANEPD-CXO245, at z = 0.449 in the AKARI NEP Deep Field. The unique infrared data on this field, including those from the nine-band photometry over 2-24 μm with the AKARI Infrared Camera, and the X-ray spectrum from Chandra allow us to constrain torus parameters such as the torus optical depth, X-ray absorbing column, torus angular width (σ), and viewing angle (i). We analyze the X-ray spectrum as well as the UV-optical-infrared spectral energy distribution (UOI-SED) with clumpy torus models in X-ray (XCLUMPY) and infrared (CLUMPY), respectively. From our current data, the constraints on σ-i from both X-rays and UOI show that the line of sight crosses the torus as expected for a type 2 AGN. We obtain a small X-ray scattering fraction (<0.1%), which suggests narrow torus openings, giving preference to the bipolar outflow picture of the double-peaked profile. Comparing the optical depth of the torus from the UOI-SED and the absorbing column density N H from the X-ray spectrum, we find that the gas-to-dust ratio is ≳4 times larger than the Galactic value.