Chandra archival study of (U)LIRGs with a double nucleus: binary AGNs?
文献类型：期刊论文
| 作者 | Wang, Jing-Bo1,2; Gao, Yu1
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2010-04-01 |
| 卷号 | 10期号:4页码:309-328 |
| 关键词 | galaxies: active galaxies: nuclei infrared: galaxies X-ray: galaxies galaxies: individuals (Mrk 266, NGC 7592, IRAS 14348-1447, IRAS 08572+3915, II Zw 035) |
| ISSN号 | 1674-4527 |
| 英文摘要 | We present our initial results from a study of 14 (U)LIRGs with a double-nucleus (z < 0.15) and an AGN signature in the Chandra archive. The goals of our study are to search for more possible cases of binary AGNs and to investigate the X-ray properties and energy sources of these energetic objects, a major effort devoted specifically to searching for binary AGNs from (U)LIRGs. Our studies suggest that Mrk 266 might be a new candidate in hosting binary AGNs supported by X-ray observations. Our analysis shows that most (U)LIRGs are essentially weak X-ray sources and are not dominated by AGNs, due to both the lack of Fe K line detections and weak emission in the hard X-ray band. We find evidence for thermal emission with temperature kT similar to 0.7 keV in seven nuclear regions, and this component is possibly associated with the nuclear or circumnuclear starburst. The soft and hard X-ray to far-infrared ratios also suggest that most (U)LIRGs are not energetically dominated by AGNs. Therefore, this study only provides one additional candidate of binary AGNs. We cannot rule out the existence of low luminosity AGNs and thus binary AGNs in all of them, particularly, those highly obscured and spatially unresolved systems. Nine of 14 (U)LIRGs, including three previously known binary AGNs and a new candidate Mrk 266, clearly have obvious X-ray counterparts to their double optical/near-IR nuclei, whereas only two out of 14 have one obvious X-ray counterpart detected. Additionally, Arp 220 and Mrk 273 are not spatially resolved owing to their small nuclear separations (similar to 1 ''), and no significant X-ray detection in the most distant source. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ULTRALUMINOUS INFRARED GALAXIES ; ACTIVE GALACTIC NUCLEUS ; BROAD-LINE REGIONS ; X-RAY SURVEY ; BLACK-HOLES ; STARBURST GALAXIES ; MASSIVE BINARY ; ASCA OBSERVATIONS ; IRAS GALAXIES ; LUMINOUS GALAXIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000277201300003 |
| 公开日期 | 2011-11-23 |
| 源URL | [http://159.226.72.40/handle/332002/1035]  |
| 专题 | 紫金山天文台_分子云与恒星形成研究团组 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jing-Bo,Gao, Yu. Chandra archival study of (U)LIRGs with a double nucleus: binary AGNs?[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2010,10(4):309-328. |
| APA | Wang, Jing-Bo,&Gao, Yu.(2010).Chandra archival study of (U)LIRGs with a double nucleus: binary AGNs?.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,10(4),309-328. |
| MLA | Wang, Jing-Bo,et al."Chandra archival study of (U)LIRGs with a double nucleus: binary AGNs?".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 10.4(2010):309-328. |
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来源：紫金山天文台
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