Spectral Classification and Ionized Gas Outflows in z?～?2 WISE-selected Hot Dust-obscured Galaxies

doi:10.3847/1538-4357/ab5e7b

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	Spectral Classification and Ionized Gas Outflows in z?～?2 WISE-selected Hot Dust-obscured Galaxies
	Jun,Hyunsung D.9,10; Assef,Roberto J.8; Bauer,Franz E.5,6,7; Blain,Andrew 4; Díaz-Santos,Tanio 3; Eisenhardt,Peter R. M.9; Stern,Daniel 9; Tsai,Chao-Wei 2; Wright,Edward, L.1; Wu,Jingwen 2
刊名	The Astrophysical Journal
	2020-01-10
卷号	888 期号:2
关键词	Active galaxies
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab5e7b
英文摘要	Abstract We present Very Large Telescope/XSHOOTER rest-frame UV–optical spectra of 10 hot dust-obscured galaxies (Hot DOGs) at z?～?2 to investigate active galactic nucleus (AGN) diagnostics and assess the presence and effect of ionized gas outflows. Most Hot DOGs in this sample are narrow-line-dominated AGNs (type 1.8 or higher) and have higher Balmer decrements than typical type 2 quasars. Almost all (8/9) sources show evidence for ionized gas outflows in the form of broad and blueshifted [O iii] profiles, and some sources have such profiles in Hα (5/7) or [O ii] (3/6). Combined with the literature, these results support additional sources of obscuration beyond the simple torus invoked by AGN unification models. Outflow rates derived from the broad [O iii] line (?103 M⊙ yr?1) are greater than the black hole accretion and star formation rates, with feedback efficiencies (～0.1%–1%) consistent with negative feedback to the host galaxy’s star formation in merger-driven quasar activity scenarios. We find that the broad emission lines in luminous, obscured quasars are often better explained by outflows within the narrow-line region and caution that black hole mass estimates for such sources in the literature may have substantial uncertainty. Regardless, we find lower bounds on the Eddington ratio for Hot DOGs near unity.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-888-2-ab5e7b
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28739]
专题	中国科学院国家天文台
作者单位	1.Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA 2.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People’s Republic of China 3.Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile 4.Department of Physics and Astronomy, University of Leicester, LE1 7RH Leicester, UK 5.Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, CO 80301, USA 6.Millennium Institute of Astrophysics (MAS), Nuncio Monse?or Sótero Sanz 100, Providencia, Santiago, Chile 7.Instituto de Astrofísica and Centro de Astroingeniería, Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile 8.Núcleo de Astronomía de la Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile 9.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA 10.School of Physics, Korea Institute for Advanced Study, 85 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea; hsjun@kias.re.kr
推荐引用方式 GB/T 7714	Jun,Hyunsung D.,Assef,Roberto J.,Bauer,Franz E.,等. Spectral Classification and Ionized Gas Outflows in z?～?2 WISE-selected Hot Dust-obscured Galaxies[J]. The Astrophysical Journal,2020,888(2).
APA	Jun,Hyunsung D..,Assef,Roberto J..,Bauer,Franz E..,Blain,Andrew.,Díaz-Santos,Tanio.,...&Wu,Jingwen.(2020).Spectral Classification and Ionized Gas Outflows in z?～?2 WISE-selected Hot Dust-obscured Galaxies.The Astrophysical Journal,888(2).
MLA	Jun,Hyunsung D.,et al."Spectral Classification and Ionized Gas Outflows in z?～?2 WISE-selected Hot Dust-obscured Galaxies".The Astrophysical Journal 888.2(2020).