The fundamental plane of spiral galaxies: theoretical expectations

	The fundamental plane of spiral galaxies: theoretical expectations
	Shen, SY ; Mo, HJ ; Shu, CG
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2002-03-21
卷号	331 期号:1 页码:259-272
关键词	galaxies : formation galaxies : fundamental parameters galaxies : spiral galaxies : structure
英文摘要	Current theory of disc galaxy formation is used to study fundamental-plane (FP) type of relations for disc galaxies. We examine how the changes in model parameters affect these relations and explore the possibility of using such relations to constrain theoretical models. The distribution of galaxy discs in the space of their fundamental properties are predicted to be concentrated in a plane, with the Tully-Fisher (TF) relation (a relation between luminosity L and maximum rotation velocity V-m) being an almost edge-on view. Using rotation velocities at larger radii generally leads to larger TF scatter. In searching for a third parameter, we find that both the disc scalelength R-d (or surface brightness) and the rotation-curve shape are correlated with the TF scatter. The FP relation in the (log L, log V-m, log R-d)-space obtained from the theory is L proportional to R-d(alpha') V-m(beta'), with alpha' similar to 0.50 and beta' similar to 2.60, consistent with the preliminary result we obtain from observational data. Using the isophotal radius instead of R-d leads to higher alpha', lower beta' and smaller scatter. Among the model parameters we probe, variation in any of them can generate significant scatter in the TF relation, but the effects of the spin parameter and halo concentration can be reduced significantly by introducing R-d While the scatter caused by varying m(d) (the ratio between disc mass and halo mass) is most effectively reduced by introducing the parameters which describe the rotation-curve shape. The TF and FP relations combined should therefore provide useful constraints on models of galaxy formation.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LOCAL CONVERGENCE DEPTH ; TULLY-FISHER RELATION ; DARK-MATTER ; DISK GALAXIES ; ELLIPTICAL GALAXIES ; ANGULAR-MOMENTUM ; BARYONIC INFALL ; ROTATION CURVES ; DENSITY PROFILE ; ABELL CLUSTERS
收录类别	SCI
语种	英语
WOS记录号	WOS:000174851000026
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/28305]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Max Planck Inst Astrophys, D-85748 Garching, Germany 3.Chinese Acad Sci, Joint Lab Opt Astron, Beijing 100864, Peoples R China
推荐引用方式 GB/T 7714	Shen, SY,Mo, HJ,Shu, CG. The fundamental plane of spiral galaxies: theoretical expectations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2002,331(1):259-272.
APA	Shen, SY,Mo, HJ,&Shu, CG.(2002).The fundamental plane of spiral galaxies: theoretical expectations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,331(1),259-272.
MLA	Shen, SY,et al."The fundamental plane of spiral galaxies: theoretical expectations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 331.1(2002):259-272.