A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like Emission
Liu,Wen-Juan1,2,3; Qian,Lei3,4; Dong,Xiao-Bo1,2,3; Jiang,Ning5; Lira,Paulina6; Cai,Zheng7; Wang,Feige8; Yang,Jinyi8; Xiao,Ting9; Kim,Minjin10,11
Source PublicationThe Astrophysical Journal
AbstractAbstract We report the discovery of a 20 kpc sized emission in SDSS J083803.68+540642.0, a ringed dwarf galaxy ( mag) hosting an accreting intermediate-mass black hole at z?=?0.02957. Analysis of the Hubble Space Telescope images indicates that it is an early-type galaxy with a featureless low-surface brightness disk ( mag?arcsec?2 in the V band) and a prominent, relatively red bulge (V ? I?=?2.03, or 0.″48) that accounts for ≈81% of the total light in the I band. A circumgalactic ring of a diameter 16 kpc is also detected, with a disperse shape on its south side. The optical emission lines reveal the nucleus to be a broad-line LINER. Our MMT longslit observation indicates that the kinematics of the extended emission is consistent with a rotational gaseous disk, with a mean blueshifted velocity of 162 and mean redshifted velocity of 86 . According to our photoionization calculations, the large-scale emission is unlikely to be powered by the central nucleus or by hot evolved (post-AGB) stars interspersed in the old stellar populations, but by in situ star formation; this is vindicated by the line-ratio diagnostic of the extended emission. We propose that both the ring and large-scale -emitting gas are created by the tidal accretion in a collision—and then merger—with a gas-rich galaxy of a comparable mass.
Keywordgalaxies: active galaxies: dwarf galaxies: individual (SDSS J083803.68+540642.0) galaxies: nuclei galaxies: Seyfert
WOS IDIOP:0004-637X-837-2-aa5eb6
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, China;;
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, Yunnan, 650011, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, P. R. China
4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China
5.Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, China
6.Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
7.UCO/Lick Observatory, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
8.Department of Astronomy, School of Physics, Peking University, Beijing 100871, China
9.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China
10.Korea Astronomy and Space Science Institute, Daejeon 305-348, Korea
11.University of Science and Technology, Daejeon 305-350, Korea
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GB/T 7714
Liu,Wen-Juan,Qian,Lei,Dong,Xiao-Bo,et al. A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like Emission[J]. The Astrophysical Journal,2017,837(2).
APA Liu,Wen-Juan.,Qian,Lei.,Dong,Xiao-Bo.,Jiang,Ning.,Lira,Paulina.,...&Kim,Minjin.(2017).A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like Emission.The Astrophysical Journal,837(2).
MLA Liu,Wen-Juan,et al."A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like Emission".The Astrophysical Journal 837.2(2017).
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