ITP OpenIR  > 理论物理所科研产出  > SCI论文
Kang, DB; He, P; Kang, DB (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.
A statistical-mechanical explanation of dark matter halo properties
Source PublicationASTRONOMY & ASTROPHYSICS
Language英语
KeywordViolent Relaxation Entropy Principle Density Slope H-functions Systems
AbstractContext. Cosmological N-body simulations have revealed many empirical relationships of dark matter halos, yet the physical origin of these halo properties still remains unclear. On the other hand, the attempts to establish the statistical mechanics for self-gravitating systems have encountered many formal difficulties, and little progress has been made for about fifty years. Aims. The aim of this work is to strengthen the validity of the statistical-mechanical approach we have proposed previously to explain the dark matter halo properties. Methods. By introducing an effective pressure instead of the radial pressure to construct the specific entropy, we use the entropy principle and proceed in a similar way as previously to obtain an entropy stationary equation. Results. An equation of state for equilibrated dark halos is derived from this entropy stationary equation, by which the dark halo density profiles with finite mass can be obtained. We also derive the anisotropy parameter and pseudo-phase-space density profile. All these predictions agree well with numerical simulations in the outer regions of dark halos. Conclusions. Our work provides further support to the idea that statistical mechanics for self-gravitating systems is a viable tool for investigation.
2011
ISSN0004-6361
Volume526Issue:*Pages:A147
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Basic Research Programm of China [2010CB832805] ; National Basic Research Programm of China [2010CB832805] ; National Basic Research Programm of China [2010CB832805] ; National Basic Research Programm of China [2010CB832805]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14416
Collection理论物理所科研产出_SCI论文
Corresponding AuthorKang, DB (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Kang, DB,He, P,Kang, DB . A statistical-mechanical explanation of dark matter halo properties[J]. ASTRONOMY & ASTROPHYSICS,2011,526(*):A147.
APA Kang, DB,He, P,&Kang, DB .(2011).A statistical-mechanical explanation of dark matter halo properties.ASTRONOMY & ASTROPHYSICS,526(*),A147.
MLA Kang, DB,et al."A statistical-mechanical explanation of dark matter halo properties".ASTRONOMY & ASTROPHYSICS 526.*(2011):A147.
Files in This Item:
File Name/Size DocType Version Access License
A statistical-mechan(186KB) 开放获取LicenseApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Kang, DB]'s Articles
[He, P]'s Articles
[Kang, DB (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Kang, DB]'s Articles
[He, P]'s Articles
[Kang, DB (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Kang, DB]'s Articles
[He, P]'s Articles
[Kang, DB (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.