On the nature of the absorber in IRAS 09104+4109: the X-ray and mid-infrared view

被引：24
作者：
Vignali, C. [1 ,2 ]
Piconcelli, E. [3 ]
Lanzuisi, G. [4 ]
Feltre, A. [5 ]
Feruglio, C. [6 ]
Maiolino, R. [3 ]
Fiore, F. [3 ]
Fritz, J. [7 ]
La Parola, V. [8 ]
Mignoli, M. [2 ]
Pozzi, F. [1 ]
机构：
[1] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy
[2] INAF Osservatorio Astron Bologna, I-40127 Bologna, Italy
[3] INAF Osservatorio Astron Roma, I-00040 Monte Porzio Catone, Italy
[4] INAF IASF Roma, I-00133 Rome, Italy
[5] Dipartimento Astron, I-35122 Padua, Italy
[6] Inst Radio Astron Millimetr, F-38406 St Martin Dheres, France
[7] Univ Ghent, Sterrenkundig Observatorium, B-9000 Ghent, Belgium
[8] INAF IASF Palermo, I-90146 Palermo, Italy
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 416卷 / 03期
关键词：
galaxies: active; galaxies: nuclei; quasars: general; quasars: individual: IRAS 09104+4109; ACTIVE GALACTIC NUCLEI; COMPTON-THICK QUASARS; SWIFT-BAT SURVEY; XMM-NEWTON VIEW; AGN DUSTY TORI; SUZAKU OBSERVATIONS; HELLAS2XMM SURVEY; OBSCURED AGN; CLUMPY TORI; DEEP SURVEY;
D O I：
10.1111/j.1365-2966.2011.19181.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a long (approximate to 76 ks) Chandra observation of IRAS 09104+4109, a hyperluminous galaxy, optically classified as a type 2 active galactic nuclei (AGN) hosted in a cD galaxy in a cluster at z = 0.442. We also report on the results obtained by fitting its broad-band spectral energy distribution. The Compton-thick nature of this source (which has been often referred to as an 'archetype' of Compton-thick type 2 quasars) was formerly claimed on the basis of its marginal detection in the Phoswich Detection System (PDS) instrument onboard BeppoSAX, being then disputed using XMM-Newton data. Both Chandra analysis and optical/mid-infrared (IR) spectral fitting are consistent with the presence of heavy (approximate to 1-5 x 10(23) cm(-2)), but not extreme (Compton-thick) obscuration. However, using the mid-IR and the [O III] emission as proxies of the nuclear hard X-ray luminosity suggests the presence of heavier obscuration. The 54-month Swift BAT map shows excess hard X-ray emission likely related to a nearby (z = 0.009) type 2 AGN, close enough to IRAS 09104+4109 to significantly enhance and contaminate its emission in the early BeppoSAX PDS data.
引用
收藏
页码：2068 / 2077
页数：10
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