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Ma, Ding; He, Ping; Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
DISTRIBUTION FUNCTION IN THE CENTER OF THE DARK MATTER HALO
Source PublicationINTERNATIONAL JOURNAL OF MODERN PHYSICS D
KeywordPhase-space Density Collisionless Equilibria Galaxy Clusters Spiral Galaxies Jeans Equation Profiles Universal Systems Models Dependence
AbstractN-body simulations of dark matter halos show that the density profiles of the halos behave as rho(r) proportional to r(-alpha(r)), where the density logarithmic slope alpha similar or equal to 1-1.5 in the center and alpha similar or equal to 3-4 in the outer parts of the halos. However, some observations are not in agreement with simulations in the very central region of the halos. The simulations also show that the velocity dispersion anisotropy parameter beta approximate to 0 in the inner part of the halo and the so-called pseudo-phase-space density rho/sigma(3) behaves as a power law in radius r. With these results in mind, we study the distribution function and the pseudo-phase-space density rho/sigma(3) of the center of dark matter halos and find that they are closely related.
2009
ISSN0218-2718
Volume18Issue:3Pages:477-484
Subject AreaPhysics
Indexed BySCI
Funding OrganizationScientific Research Foundation for the Returned Overseas Chinese Scholars; State Education Ministry of China; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Scientific Research Foundation for the Returned Overseas Chinese Scholars; State Education Ministry of China; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Scientific Research Foundation for the Returned Overseas Chinese Scholars; State Education Ministry of China; Chinese Academy of Sciences[KJCX3-SYW-N2] ; Scientific Research Foundation for the Returned Overseas Chinese Scholars; State Education Ministry of China; Chinese Academy of Sciences[KJCX3-SYW-N2]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5386
CollectionSCI期刊论文
Corresponding AuthorMa, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ma, Ding,He, Ping,Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China. DISTRIBUTION FUNCTION IN THE CENTER OF THE DARK MATTER HALO[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D,2009,18(3):477-484.
APA Ma, Ding,He, Ping,&Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.(2009).DISTRIBUTION FUNCTION IN THE CENTER OF THE DARK MATTER HALO.INTERNATIONAL JOURNAL OF MODERN PHYSICS D,18(3),477-484.
MLA Ma, Ding,et al."DISTRIBUTION FUNCTION IN THE CENTER OF THE DARK MATTER HALO".INTERNATIONAL JOURNAL OF MODERN PHYSICS D 18.3(2009):477-484.
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