A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like H alpha Emission

	A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like H alpha Emission
	Liu, Wen-Juan 1,2,3; Qian, Lei 3,4; Dong, Xiao-Bo 1,2,3; Jiang, Ning 5; Lira, Paulina 6; Cai, Zheng 7; Wang, Feige 8; Yang, Jinyi 8; Xiao, Ting 9; Kim, Minjin 10,11
刊名	ASTROPHYSICAL JOURNAL
	2017-03-10
卷号	837 期号:2
关键词	galaxies: active galaxies: dwarf galaxies: individual (SDSS J083803.68+540642.0) galaxies: nuclei galaxies: Seyfert
英文摘要	We report the discovery of a 20 kpc sized H alpha emission in SDSS J083803.68+540642.0, a ringed dwarf galaxy (M-V = -17.89 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 (mu(0) = 20.39 mag arcsec(-2) in the V band) and a prominent, relatively red bulge (V - I = 2.03, R-e = 0.28 kpc or 0 48) that accounts for approximate to 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 H alpha emission is consistent with a rotational gaseous disk, with a mean blueshifted velocity of 162 km s(-1) and mean redshifted velocity of 86 km s(-1). According to our photoionization calculations, the large-scale H alpha 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 H alpha-emitting gas are created by the tidal accretion in a collision-and then merger-with a gas-rich galaxy of a comparable mass.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; DIGITAL SKY SURVEY ; NEARBY GALAXIES ; STAR-FORMATION ; X-RAY ; TINY TITANS ; 1ST SURVEY ; OLD STARS ; EVOLUTION ; AGN
收录类别	SCI
语种	英语
WOS记录号	WOS:000401172400007
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8782]
专题	国家天文台_射电天文研究部
作者单位	1.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China 2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China 3.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.Univ Sci & Technol China, Dept Astron, Hefei 230026, Anhui, Peoples R China 6.Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile 7.Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, 1156 High St, Santa Cruz, CA 95064 USA 8.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 9.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 10.Korea Astron & Space Sci Inst, Daejeon 305348, South Korea
推荐引用方式 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 H alpha Emission[J]. 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 H alpha Emission.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 H alpha Emission".ASTROPHYSICAL JOURNAL 837.2(2017).