ITP OpenIR  > 理论物理所科研产出  > SCI论文
He, P; Kang, DB; He, P (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.
Saddle-point entropy states of equilibrated self-gravitating systems
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Language英语
KeywordDark-matter Haloes Violent Relaxation H-functions
AbstractIn this Letter, we investigate the stability of the statistical equilibrium of spherically symmetric collisionless self-gravitating systems. By calculating the second variation of the entropy, we find that perturbations of the relevant physical quantities should be classified as long-and short-range perturbations, which correspond to the long-and short-range relaxation mechanisms, respectively. We show that the statistical equilibrium states of self-gravitating systems are neither maximum nor minimum, but complex saddle-point entropy states, and hence differ greatly from the case of ideal gas. Violent relaxation should be divided into two phases. The first phase is the entropy-production phase, while the second phase is the entropy-decreasing phase. We speculate that the second-phase violent relaxation may just be the long-wave Landau damping, which would work together with short-range relaxations to keep the system equilibrated around the saddle-point entropy states.
2011
ISSN0035-8711
Volume414Issue:1Pages:L21-L25
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Basic Research Program of China [2010CB832805] ; National Basic Research Program of China [2010CB832805] ; National Basic Research Program of China [2010CB832805] ; National Basic Research Program of China [2010CB832805]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14345
Collection理论物理所科研产出_SCI论文
Corresponding AuthorHe, P (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
He, P,Kang, DB,He, P . Saddle-point entropy states of equilibrated self-gravitating systems[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,414(1):L21-L25.
APA He, P,Kang, DB,&He, P .(2011).Saddle-point entropy states of equilibrated self-gravitating systems.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,414(1),L21-L25.
MLA He, P,et al."Saddle-point entropy states of equilibrated self-gravitating systems".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 414.1(2011):L21-L25.
Files in This Item:
File Name/Size DocType Version Access License
Saddle-point entropy(111KB) 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
[He, P]'s Articles
[Kang, DB]'s Articles
[He, P (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
[He, P]'s Articles
[Kang, DB]'s Articles
[He, P (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
[He, P]'s Articles
[Kang, DB]'s Articles
[He, P (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.