The growth of the central region by acquisition of counterrotating gas in star-forming galaxies

	The growth of the central region by acquisition of counterrotating gas in star-forming galaxies
	Chen, Yan-Mei 1,2,3; Shi, Yong 1,2,3; Tremonti, Christy A.4; Bershady, Matt 4; Merrifield, Michael 5; Emsellem, Eric 6,7,8; Jin, Yi-Fei 1,2,3; Huang, Song 9; Fu, Hai 10; Wake, David A.11
刊名	NATURE COMMUNICATIONS
	2016-10-19
卷号	7
英文摘要	Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-forming galaxies are rare, leaving uncertain the role of external gas acquisition in driving evolution of blue galaxies. Here, based on new measurements with integral field spectroscopy of a large representative galaxy sample, we find an appreciable fraction of counter-rotators among blue galaxies (9 out of 489 galaxies). The central regions of blue counter-rotators show younger stellar populations and more intense, ongoing star formation than their outer parts, indicating ongoing growth of the central regions. The result offers observational evidence that the acquisition of external gas in blue galaxies is possible; the interaction with pre-existing gas funnels the gas into nuclear regions (<1 kpc) to form new stars.
WOS标题词	Science & Technology
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	STELLAR POPULATION SYNTHESIS ; DIGITAL SKY SURVEY ; SAURON PROJECT ; LINE SPECTRA ; IONIZED-GAS ; KINEMATICS ; EMISSION ; ORIGIN ; METALLICITY ; SEARCH
收录类别	SCI
语种	英语
WOS记录号	WOS:000385618300001
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6901]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China 3.Collaborat Innovat Ctr Modern Astron & Space Expl, Nanjing 210093, Jiangsu, Peoples R China 4.Univ Wisconsin, Dept Astron, 1150 Univ Ave, Madison, WI 53706 USA 5.Univ Nottingham, Sch Phys & Astron, Univ Pk, Nottingham NG7 2RD, England 6.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 7.Univ Lyon 1, Observ Lyon, Ctr Rech Astrophys Lyon, 9 Ave Charles Andre, F-69230 St Genis Laval, France 8.Univ Lyon 1, Observ Lyon, Ecole Normale Super Lyon, 9 Ave Charles Andre, F-69230 St Genis Laval, France 9.Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Univ Kavli IPMU WPI, Kashiwa, Chiba 2778583, Japan 10.Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA
推荐引用方式 GB/T 7714	Chen, Yan-Mei,Shi, Yong,Tremonti, Christy A.,et al. The growth of the central region by acquisition of counterrotating gas in star-forming galaxies[J]. NATURE COMMUNICATIONS,2016,7.
APA	Chen, Yan-Mei.,Shi, Yong.,Tremonti, Christy A..,Bershady, Matt.,Merrifield, Michael.,...&Yan, Ren-Bin.(2016).The growth of the central region by acquisition of counterrotating gas in star-forming galaxies.NATURE COMMUNICATIONS,7.
MLA	Chen, Yan-Mei,et al."The growth of the central region by acquisition of counterrotating gas in star-forming galaxies".NATURE COMMUNICATIONS 7(2016).