The velocity distribution of Sloan Digital Sky Survey satellites in Modified Newtonian Dynamics

被引：23

作者：

Angus, G. W. ^{[1
]}

Famaey, B. ^{[2
]}

Tiret, O. ^{[3
]}

Combes, F. ^{[3
]}

Zhao, H. S. ^{[1
]}

机构：

[1] Univ St Andrews, SUPA, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[2] Univ Libre Bruxelles, Inst Astron & Astrophys, B-1050 Brussels, Belgium

[3] LERMA, Observ Paris, F-75014 Paris, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2008年 / 383卷 / 01期

基金：

英国科学技术设施理事会;

关键词：

gravitation; galaxies : clusters; dark matter;

D O I：

10.1111/j.1745-3933.2007.00393.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The recent Sloan Digital Sky Survey measured velocity distribution of satellite galaxies has been modelled in the context of Modified Newtonian Dynamics (MOND). We show that even when the extra constraint of adhering to the projected satellite number density profile is added, the two line-of-sight (los) velocity dispersion profiles presented in Klypin & Prada can be matched simply with a radially varying anisotropy. Interestingly, the anisotropies required to fit the los velocity dispersions are remarkably similar to the anisotropies generated by dissipationless collapse simulations in MOND. The mass-to-light ratios of the two host galaxies used are sensible, and positivity of the distribution function is satisfied.

引用

页码：L1 / L4

页数：4

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