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Torus constraints in ANEPD-CXO245: A Compton-thick AGN with double-peaked narrow lines

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Brunner,  Hermann
High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;

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Citation

Miyaji, T., Herrera-Endoqui, M., Krumpe, M., Hanzawa, M., Shogaki, A., Matsuura, S., et al. (2019). Torus constraints in ANEPD-CXO245: A Compton-thick AGN with double-peaked narrow lines. The Astrophysical Journal Letters, 884(1): L10. doi:10.3847/2041-8213/ab46bc.


Cite as: http://hdl.handle.net/21.11116/0000-0005-961C-3
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.