Hot Dust-obscured Galaxies with Excess Blue Light
文献类型：期刊论文
| 作者 | Assef,R. J.12; Brightman,M.13; Walton,D. J.1; Stern,D.2; Bauer,F. E.4,5,11; Blain,A. W.6; Díaz-Santos,T.10,12,14; Eisenhardt,P. R. M.2; Hickox,R. C.7; Jun,H. D.9 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-07-01 |
| 卷号 | 897期号:2 |
| 关键词 | Active galaxies Galaxy evolution High-redshift galaxies Quasars Infrared galaxies |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab9814 |
| 英文摘要 | Abstract Hot dust-obscured galaxies (Hot DOGs) are among the most luminous galaxies in the universe. Powered by highly obscured, possibly Compton-thick, active galactic nuclei (AGNs), Hot DOGs are characterized by spectral energy distributions that are very red in the mid-infrared yet dominated by the host galaxy stellar emission in the UV and optical. An earlier study identified a subsample of Hot DOGs with significantly enhanced UV emission. One target, W0204–0506, was studied in detail and, based on Chandra observations, it was concluded that the enhanced emission was most likely due to either extreme unobscured star formation (star formation rate?>?1000 M⊙ yr?1) or to light from the highly obscured AGN scattered by gas or dust into our line of sight. Here, we present a follow-up study of W0204–0506 as well as two more Hot DOGs with excess UV emission. For the two new objects we obtained Chandra/ACIS-S observations, and for all three targets we obtained Hubble Space Telescope/WFC3 F555W and F160W imaging. The analysis of these observations, combined with multiwavelength photometry and UV/optical spectroscopy suggests that UV emission is most likely dominated by light from the central highly obscured, hyperluminous AGN that has been scattered into our line of sight, by either gas or dust. We cannot decisively rule out, however, that star formation or a second AGN in the system may significantly contribute to the UV excess of these targets. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-897-2-AB9814 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/63154]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK 2.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA 3.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China 4.Millennium Institute of Astrophysics (MAS), Nuncio Monse?or Sótero Sanz 100, Providencia, Santiago, Chile 5.Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, CO 80301, USA 6.Physics & Astronomy, University of Leicester, 1 University Road, Leicester LE1 7RH, UK 7.Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 03755, USA 8.Department of Physics, University of Crete, 71003, Heraklion, Greece 9.School of Physics, Korea Institute for Advanced Study, 85 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea 10.Institute of Astrophysics, Foundation for Research and Technology–Hellas (FORTH), Heraklion, GR-70013, Greece |
| 推荐引用方式 GB/T 7714 | Assef,R. J.,Brightman,M.,Walton,D. J.,et al. Hot Dust-obscured Galaxies with Excess Blue Light[J]. The Astrophysical Journal,2020,897(2). |
| APA | Assef,R. J..,Brightman,M..,Walton,D. J..,Stern,D..,Bauer,F. E..,...&Wu,J. W..(2020).Hot Dust-obscured Galaxies with Excess Blue Light.The Astrophysical Journal,897(2). |
| MLA | Assef,R. J.,et al."Hot Dust-obscured Galaxies with Excess Blue Light".The Astrophysical Journal 897.2(2020). |
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