Fast Outflows in Hot Dust-obscured Galaxies Detected with Keck/NIRES
文献类型：期刊论文
| 作者 | Finnerty,Luke2; Larson,Kirsten2; Soifer,B. T.2; Armus,Lee3; Matthews,Keith2; Jun,Hyunsung D.4; Moon,Dae-Sik5; Melbourne,Jason2; Gomez,Percy6; Tsai,Chao-Wei7 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 905期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Infrared galaxies High-redshift galaxies Active galaxies |
| DOI | 10.3847/1538-4357/abc3bf |
| 英文摘要 | Abstract We present rest-frame optical spectroscopic observations of 24 Hot Dust-Obscured Galaxies (Hot DOGs) at redshifts 1.7–4.6 with KECK/NIRES. Our targets are selected, based on their extreme red colors, to be the highest-luminosity sources from the WISE infrared survey. In 20 sources with well-detected emission, we fit the key [O iii], Hβ, Hα, [N ii], and [S ii] diagnostic lines to constrain physical conditions. Of the 17 targets with a clear detection of the [O iii]λ5007 ? emission line, 15 display broad blueshifted and asymmetric line profiles, with widths ranging from 1000 to 8000 km s?1 and blueshifts up to 3000 km s?1. These kinematics provide strong evidence for the presence of massive ionized outflows of up to , with a median of . As many as eight sources show optical emission line ratios consistent with vigorous star formation. Balmer-line star formation rates, uncorrected for reddening, range from 30 to 1300 , with a median of . Estimates of the SFR from Spectral Energy Distribution fitting of mid- and far-infrared photometry suggest significantly higher values. We estimate the central black hole masses to be of order , assuming the present-day relation. The bolometric luminosities and the estimated masses of the central black holes of these galaxies suggest that many of the active galactic nucleus-dominated Hot DOGs are accreting at or above their Eddington limit. The combination of ongoing star formation, massive outflows, and high Eddington ratios suggest Hot DOGs are a transitional phase in galaxy evolution. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-905-1-ABC3BF |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/57823]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA 2.Division of Physics, Math, and Astronomy, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA; lfinnerty@astro.ucla.edu 3.IPAC, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA 4.School of Physics, Korea Institute for Advanced Study, 85 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea 5.Dept. of Astronomy and Astrophysics, University of Toronto, 50 St. George St., Toronto, ON M5S 3H4, Canada 6.W.M. Keck Observatory, Kameula, HI, USA 7.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Rd., Chaoyang District, Beijing 100012, People’s Republic of China 8.Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile 9.Chinese Academy of Sciences South America Center for Astronomy (CASSACA), National Astronomical Observatories, CAS, Beijing 100101, People's Republic of China 10.Institute of Astrophysics, Foundation for Research and Technology—Hellas (FORTH), Heraklion, GR-70013, Greece |
| 推荐引用方式 GB/T 7714 | Finnerty,Luke,Larson,Kirsten,Soifer,B. T.,et al. Fast Outflows in Hot Dust-obscured Galaxies Detected with Keck/NIRES[J]. The Astrophysical Journal,2020,905(1). |
| APA | Finnerty,Luke.,Larson,Kirsten.,Soifer,B. T..,Armus,Lee.,Matthews,Keith.,...&Cushing,Michael.(2020).Fast Outflows in Hot Dust-obscured Galaxies Detected with Keck/NIRES.The Astrophysical Journal,905(1). |
| MLA | Finnerty,Luke,et al."Fast Outflows in Hot Dust-obscured Galaxies Detected with Keck/NIRES".The Astrophysical Journal 905.1(2020). |
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来源：国家天文台
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