Revealing the high energy emission from the obscured Seyfert galaxy MCG -5-23-16 with Suzaku

被引：0

作者：

Reeves, James N. ^{[1
,2
]}

Awaki, Hisamitsu ^{[3
]}

Dewangan, Gulab C. ^{[4
]}

Fabian, Andy C. ^{[5
]}

Fukazawa, Yasushi ^{[6
]}

Gallo, Luigi ^{[7
,8
]}

Griffiths, Richard ^{[4
]}

Inoue, Hajime ^{[8
]}

Kunieda, Hideyo ^{[8
,9
]}

Markowitz, Alex ^{[1
]}

Miniutti, Giovanni ^{[5
]}

Mizuno, Tsunefumi ^{[6
]}

Mushotzky, Richard ^{[1
]}

Okajima, Takashi ^{[1
,2
]}

Ptak, Andy ^{[1
,2
]}

Takahashi, Tadayuki ^{[8
]}

Terashima, Yuichi ^{[3
,8
]}

Ushio, Masayoshi ^{[8
]}

Watanabe, Shin ^{[8
]}

Yamasaki, Tomonori ^{[6
]}

Yamauchi, Makoto ^{[10
]}

Yaqoob, Tahir ^{[1
,2
]}

机构：

[1] Exploration of the Universe Division, Code 662, NASA Goddard Space Flight Center, Greenbelt Road, Greenbelt, MD 20771, United States

[2] Department of Physics and Astronomy, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, United States

[3] Department of Physics, Ehime University, 2-5 Bunkyocho, Matsuyama, Ehime 790-8577, Japan

[4] Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, United States

[5] Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, United Kingdom

[6] Department of Physical Science, Hiroshima University, 1-3-1 Kagamiyama, Hiroshima 739-8526, Japan

[7] Max-Planck-Institut für Extraterrestrische Physik, Postfach 1312, Garching, Germany

[8] Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan

[9] Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan

[10] Department of Applied Physics, University of Miyazaki, 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan

来源：

Publications of the Astronomical Society of Japan | 2007年 / 59卷 / 1 SPEC. ISS.期

关键词：

Gamma rays - Photons - Iron;

D O I：

10.1093/pasj/59.sp1.s301

中图分类号：

学科分类号：

摘要：

We report on a 100 ks Suzaku observation of the bright, nearby (z = 0.008486) Seyfert 1.9 galaxy MCG -5-23-16. The broad-band (0.4-100keV) X-ray spectrum allows us to determine the nature of the high energy emission with little ambiguity. The X-ray continuum consists of a cutoff power-law of photon index Γ = 1.9, absorbed through Compton-thin matter of column density NH = 1.6 × 1022cm-2. A soft excess is observed below 1 keV and is likely a combination of emission from scattered continuum photons and distant photoionized gas. The iron K line profile is complex, showing narrow neutral iron Kα and Kβ emission, as well as a broad line which can be modeled by a moderately inclined accretion disk. The line profile shows either the disk is truncated at a few tens of gravitational radii, or the disk emissivity profile is relatively flat. A strong Compton reflection component is detected above 10 keV, which is best modeled by a combination of reflection off distant matter and the accretion disk. The reflection component does not appear to vary. The overall picture is that this Seyfert 1.9 galaxy is viewed at moderate (∼ 50°) inclination through Compton-thin matter at the edge of a Compton-thick torus covering ∼ 2π steradians. consistent with unified models. © 2007. Astronomical Society of Japan.

引用

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