A Universe of ultradiffuse galaxies: theoretical predictions from I > CDM simulations

doi:10.1093/mnras/stx1440

	A Universe of ultradiffuse galaxies: theoretical predictions from I > CDM simulations
	Sun, Shuangpeng1 ; Rong, Yu 1; Guo, Qi1 ; Gao, Liang1,4 ; Liao, Shihong 1; Xie, Lizhi3 ; Pan, Jun1 ; Puzia, Thomas H.2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2017-10-01
卷号	470 期号:4 页码:4231-4240
关键词	Methods: Numerical Galaxies: Evolution Galaxies: Stellar Content
DOI	10.1093/mnras/stx1440
文献子类	Article
英文摘要	A particular population of galaxies have drawn much interest recently, which are as faint as typical dwarf galaxies but have the sizes as large as L* galaxies, the so called ultradiffuse galaxies (UDGs). The lack of tidal features of UDGs in dense environments suggests that their host haloes are perhaps as massive as that of the Milky Way. On the other hand, galaxy formation efficiency should be much higher in the haloes of such masses. Here, we use the model galaxy catalogue generated by populating two large simulations: the Millennium-II cosmological simulation and Phoenix simulations of nine big clusters with the semi-analytic galaxy formation model. This model reproduces remarkably well the observed properties of UDGs in the nearby clusters, including the abundance, profile, colour and morphology, etc. We search for UDG candidates using the public data and find two UDG candidates in our Local Group and 23 in our Local Volume, in excellent agreement with the model predictions. We demonstrate that UDGs are genuine dwarf galaxies, formed in the haloes of similar to 10(10) M-circle dot. It is the combination of the late formation time and high spins of the host haloes that results in the spatially extended feature of this particular population. The lack of tidal disruption features of UDGs in clusters can also be explained by their late infall-time.
WOS关键词	ULTRA-DIFFUSE GALAXIES ; STAR-FORMATION ; DARK-MATTER ; COSMIC TIME ; LAMBDA-CDM ; MASS ; POPULATION ; CLUSTERS ; DWARF ; COMA
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000408207600032
资助机构	NSFC(11425312 ; NSFC(11425312 ; FONDECYT(1161817) ; FONDECYT(1161817) ; BASAL Center for Astrophysics and Associated Technologies(PFB-06) ; BASAL Center for Astrophysics and Associated Technologies(PFB-06) ; National Basic Research Program of China (program 973)(2015CB857001) ; National Basic Research Program of China (program 973)(2015CB857001) ; 11573030) ; 11573030) ; NSFC(11425312 ; NSFC(11425312 ; FONDECYT(1161817) ; FONDECYT(1161817) ; BASAL Center for Astrophysics and Associated Technologies(PFB-06) ; BASAL Center for Astrophysics and Associated Technologies(PFB-06) ; National Basic Research Program of China (program 973)(2015CB857001) ; National Basic Research Program of China (program 973)(2015CB857001) ; 11573030) ; 11573030)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/20136]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Partner Grp,Max Planck Inst Astrophys, Beijing 100012, Peoples R China 2.Pontificia Univ Catolica Chile, Inst Astrofis, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile 3.INAF, OATS, Via Bazzoni 2, I-34124 Trieste, TS, Italy 4.Univ Durham, Inst Computat Cosmol, Dept Phys, Sci Labs, South Rd, Durham DH1 3LE, England
推荐引用方式 GB/T 7714	Sun, Shuangpeng,Rong, Yu,Guo, Qi,et al. A Universe of ultradiffuse galaxies: theoretical predictions from I > CDM simulations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,470(4):4231-4240.
APA	Sun, Shuangpeng.,Rong, Yu.,Guo, Qi.,Gao, Liang.,Liao, Shihong.,...&Puzia, Thomas H..(2017).A Universe of ultradiffuse galaxies: theoretical predictions from I > CDM simulations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,470(4),4231-4240.
MLA	Sun, Shuangpeng,et al."A Universe of ultradiffuse galaxies: theoretical predictions from I > CDM simulations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 470.4(2017):4231-4240.