Tracking the complex absorption in NGC 2110 with two Suzaku observations

Journal Article · Sat May 10 04:00:00 EDT 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/786/2/126· OSTI ID:22356936

Rivers, Elizabeth; Markowitz, Alex; Rothschild, Richard ^[1]; Bamba, Aya ^[2]; Fukazawa, Yasushi ^[3]; Okajima, Takashi ^[4]; Reeves, James ^[5]; Terashima, Yuichi ^[6]; Ueda, Yoshihiro ^[7]

---

1. Center for Astrophysics and Space Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0424 (United States)
2. Department of Physics and Mathematics, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258 (Japan)
3. Department of Physical Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 (Japan)
4. NASA/Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
5. Astrophysics Group, School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire, ST5 5BG (United Kingdom)
6. Department of Physics, Ehime University 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577 (Japan)
7. Department of Astronomy, Kyoto University, Kyoto 606-8502 (Japan)

We present spectral analysis of two Suzaku observations of the Seyfert 2 galaxy, NGC 2110. This source has been known to show complex, variable absorption which we study in depth by analyzing these two observations set 7 yr apart and by comparing them to previously analyzed observations with the XMM-Newton and Chandra observatories. We find that there is a relatively stable, full-covering absorber with a column density of ∼3× 10{sup 22} cm{sup –2}, with an additional patchy absorber that is likely variable in both column density and covering fraction over timescales of years, consistent with clouds in a patchy torus or in the broad line region. We model a soft emission line complex, likely arising from ionized plasma and consistent with previous studies. We find no evidence for reflection from an accretion disk in this source with contribution from neither relativistically broadened Fe Kα line emission, nor from a Compton reflection hump.

• OSTI ID: 22356936
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 786; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABSORPTION
ACCRETION DISKS
COMPARATIVE EVALUATIONS
DENSITY
EMISSION
PLASMA
REFLECTION
SEYFERT GALAXIES
X-RAY GALAXIES