Distribution function of dark matter with constant anisotropy
文献类型：期刊论文
| 作者 | Ma, Ding; He, Ping; Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China |
| 刊名 | INTERNATIONAL JOURNAL OF MODERN PHYSICS D
 |
| 出版日期 | 2008 |
| 卷号 | 17期号:8页码:1283-1294 |
| 关键词 | Spherical Stellar-systems 2-integral Distribution-functions Central Black-hole Dynamical Models Density Profiles Velocity Distributions Analytical Family Hernquist Models Galaxies Stability |
| ISSN号 | 0218-2718 |
| 英文摘要 | N-body simulations of dark matter halos show that the density is cusped near the center of the halo. The density pro. le behaves as r(-gamma). in the inner parts, where gamma similar or equal to 1 for the NFW model and gamma similar or equal to 1.5 for the Moore model, but in the outer parts the two models agree with each other in the asymptotic behavior of the density profile. The simulations also show information about the anisotropy parameter beta(r) of the velocity distribution: beta approximate to 0 in the inner part and beta approximate to 0.5 (radially anisotropic) in the outer part of the halo. We provide some distribution functions F(E, L) with the constant anisotropy parameter beta for the two spherical models of dark matter halos: a new generalized NFW model and a generalized Moore model. There are two parameters alpha and epsilon for those two generalized models to determine the asymptotic behavior of the density pro. le. In this paper, we concentrate on the situation of beta(r) = 1/2 from the viewpoint of the simulation. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000259047300010 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5497]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Ding,He, Ping,Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. Distribution function of dark matter with constant anisotropy[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D,2008,17(8):1283-1294. |
| APA | Ma, Ding,He, Ping,&Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.(2008).Distribution function of dark matter with constant anisotropy.INTERNATIONAL JOURNAL OF MODERN PHYSICS D,17(8),1283-1294. |
| MLA | Ma, Ding,et al."Distribution function of dark matter with constant anisotropy".INTERNATIONAL JOURNAL OF MODERN PHYSICS D 17.8(2008):1283-1294. |
入库方式： OAI收割
来源：理论物理研究所
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