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Spectral Classification and Ionized Gas Outflows in z?~?2 WISE-selected Hot Dust-obscured Galaxies
Jun,Hyunsung D.1,2; Assef,Roberto J.3; Bauer,Franz E.4,5,6; Blain,Andrew7; Díaz-Santos,Tanio8; Eisenhardt,Peter R. M.2; Stern,Daniel2; Tsai,Chao-Wei9; Wright,Edward, L.10; Wu,Jingwen9
2020-01-10
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume888Issue:2
AbstractAbstract 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.
KeywordActive galaxies
DOI10.3847/1538-4357/ab5e7b
Language英语
WOS IDIOP:0004-637X-888-2-ab5e7b
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/28740
Collection中国科学院国家天文台
Affiliation1.School of Physics, Korea Institute for Advanced Study, 85 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea; hsjun@kias.re.kr
2.Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
3.Núcleo de Astronomía de la Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile
4.Instituto de Astrofísica and Centro de Astroingeniería, Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile
5.Millennium Institute of Astrophysics (MAS), Nuncio Monse?or Sótero Sanz 100, Providencia, Santiago, Chile
6.Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, CO 80301, USA
7.Department of Physics and Astronomy, University of Leicester, LE1 7RH Leicester, UK
8.Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile
9.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People’s Republic of China
10.Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA
Recommended Citation
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).
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