The dependence of tidal stripping efficiency on the satellite and host galaxy morphology

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 暗物质和空间天文实验室

	The dependence of tidal stripping efficiency on the satellite and host galaxy morphology
	Chang, Jiang 1,2; Maccio, Andrea V.2; Kang, Xi1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2013-06-01
卷号	431 期号:4 页码:3533-3542
关键词	methods: numerical galaxies: evolution galaxies: interactions galaxies: kinematics and dynamics
ISSN号	0035-8711
通讯作者	Chang, J (reprint author), Acad Sinica, Purple Mt Observ, Partner Grp MPI Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China. Email: jchang@mpia.de
英文摘要	In this paper, we study the tidal stripping process for satellite galaxies orbiting around a massive host galaxy, and focus on its dependence on the morphology of both satellite and host galaxy. For this purpose, we use three different morphologies for the satellites: pure disc, pure bulge and a mixture bulge+disc. Two morphologies are used for the host galaxies: bulge+disc and pure bulge. We find that while the spheroidal stellar component experiences a constant power law like mass removal, the disc is exposed to an exponential mass-loss when the tidal radius of the satellite is of the same order of the disc scalelength. This dramatic mass-loss is able to completely remove the stellar component on time-scale of 100 Myr. As a consequence two satellites with the same stellar and dark matter masses, on the same orbit could either retain considerable fraction of their stellar mass after 10 Gyr or being completely destroyed, depending on their initial stellar morphology. We find that there are two characteristic time-scales describing the beginning and the end of the disc removal, whose values are related to the size of the disc. This result can be easily incorporated in semi-analytical models. We also find that the host morphology and the orbital parameters also have an effect on determining the mass removal, but they are of secondary importance with respect to satellite morphology. We conclude that satellite morphology has a very strong effect on the efficiency of stellar stripping and should be taken into account in modelling galaxy formation and evolution.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DWARF SPHEROIDAL GALAXIES ; INTRACLUSTER PLANETARY-NEBULAE ; DARK-MATTER SUBSTRUCTURE ; MILKY-WAY ; DYNAMICAL FRICTION ; HALO SUBSTRUCTURE ; MERGER REMNANTS ; STELLAR HALOS ; DISK GALAXIES ; HIGH-REDSHIFT
收录类别	SCI
语种	英语
WOS记录号	WOS:000319479000045
公开日期	2014-01-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/9763]
专题	紫金山天文台_暗物质和空间天文实验室
作者单位	1.Acad Sinica, Purple Mt Observ, Partner Grp MPI Astron, Nanjing 210008, Jiangsu, Peoples R China 2.Max Planck Inst Astron, D-69117 Heidelberg, Germany
推荐引用方式 GB/T 7714	Chang, Jiang,Maccio, Andrea V.,Kang, Xi. The dependence of tidal stripping efficiency on the satellite and host galaxy morphology[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,431(4):3533-3542.
APA	Chang, Jiang,Maccio, Andrea V.,&Kang, Xi.(2013).The dependence of tidal stripping efficiency on the satellite and host galaxy morphology.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,431(4),3533-3542.
MLA	Chang, Jiang,et al."The dependence of tidal stripping efficiency on the satellite and host galaxy morphology".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 431.4(2013):3533-3542.