Bulge formation from super star clusters in a responding cuspy dark matter halo

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 历算和天文参考系研究团组

	Bulge formation from super star clusters in a responding cuspy dark matter halo
	Fu, Yan-Ning; Liu, Wen-Hao ; Huang, Jie-Hao ; Deng, Zu-Gan
刊名	ASTROPHYSICAL JOURNAL
	2007-06-10
卷号	662 期号:1 页码:250-258
关键词	dark matter galaxies : bulges galaxies : kinematics and dynamics galaxies : nuclei galaxies : star clusters galaxies : structure
ISSN号	0004-637X
英文摘要	We simulate the bulge formation in very late type dwarf galaxies from circumnuclear super star clusters (SSCs) moving in a responding cuspy dark matter halo (DMH). The simulations show that (1) the response of a DMH to the sinking of SSCs is detectable only in the region interior to about 200 pc. The mean logarithmic slope of the responding DM density profile over that area displays two different phases: a very early decrease followed by an increase until it approaches 1.2 at the age of 2 Gyr. (2) The detectable feedbacks of the DMH response on the bulge formation turned out to be very small, in the sense that the formed bulges and their nuclear cusps in the fixed and the responding DMH are basically the same; both are consistent with HST observations. (3) The yielded mass correlation of bulges to their nuclear (stellar) cusps and the time evolution of the cusps' mass are in accordance with recent findings for relevant relations. In combination with the consistency of effective radii of nuclear cusps with observed quantities of nuclear clusters, we believe that the bulge formation scenario that we proposed could be a very promising mechanism for forming nuclear clusters.
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]	UNIVERSAL DENSITY PROFILE ; SPIRAL GALAXIES ; DYNAMICAL FRICTION ; DOMINATED GALAXIES ; MASS-DISTRIBUTION ; INNER STRUCTURE ; SLOPES ; MODELS ; SATELLITES ; DWARF
收录类别	SCI
语种	英语
WOS记录号	WOS:000247074400019
公开日期	2012-02-05
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/2350]
专题	紫金山天文台_历算和天文参考系研究团组
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Observ, Beijing 100012, Peoples R China 3.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92617 USA 4.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China 5.Chinese Acad Sci, Grad Sch, Coll Phys Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fu, Yan-Ning,Liu, Wen-Hao,Huang, Jie-Hao,et al. Bulge formation from super star clusters in a responding cuspy dark matter halo[J]. ASTROPHYSICAL JOURNAL,2007,662(1):250-258.
APA	Fu, Yan-Ning,Liu, Wen-Hao,Huang, Jie-Hao,&Deng, Zu-Gan.(2007).Bulge formation from super star clusters in a responding cuspy dark matter halo.ASTROPHYSICAL JOURNAL,662(1),250-258.
MLA	Fu, Yan-Ning,et al."Bulge formation from super star clusters in a responding cuspy dark matter halo".ASTROPHYSICAL JOURNAL 662.1(2007):250-258.