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DISTRIBUTION FUNCTION IN THE CENTER OF THE DARK MATTER HALO
Ma, Ding; He, Ping; Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
2009
发表期刊INTERNATIONAL JOURNAL OF MODERN PHYSICS D
ISSN0218-2718
卷号18期号:3页码:477-484
摘要N-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.
部门归属[Ma, D; He, P] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
关键词Phase-space Density Collisionless Equilibria Galaxy Clusters Spiral Galaxies Jeans Equation Profiles Universal Systems Models Dependence
学科领域Physics
资助者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] ; 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] ; 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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收录类别SCI
资助者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] ; 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] ; 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]
WOS记录号WOS:000265543800011
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5386
专题理论物理所SCI论文
通讯作者Ma, D , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
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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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