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

页码：2068 / 2077

页数：10

共 87 条

[1] RELIABLE IDENTIFICATION OF COMPTON-THICK QUASARS AT z ≈ 2: SPITZER MID-INFRARED SPECTROSCOPY OF HDF-oMD49 [J].