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arXiv 0811.0382astro-phgr-qchep-ph
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与非对称M-B速度分布一致的晕密度分布--对直接暗物质散射的影响

Halo Density Profiles Consistent with Asymmetric M-B Velocity Distributions-Implications on Direct Dark Matter Searches

J. D. Vergados

摘要:

本文从球对称WIMP密度剖面出发,采用Eddington方法,自洽地得到了我们附近的WIMP速度分布。通过在能量表达式中加入合理的角动量相关项,我们也得到了轴对称的WIMP速度分布。我们发现,一些密度剖面导致近似的麦克斯韦-玻尔兹曼分布,这是自动定义在有限的域,即逃逸速度不需要把手。这种分布在获得直接的WIMP检测率,包括调制的作用,进行了一些详细的研究,特别是,不对称的作用进行了探讨。

英文摘要:

In the present paper we obtain the WIMP velocity distribution in our vicinity starting from spherically symmetric WIMP density profiles in a self consistent way by employing the Eddington approach. By adding a reasonable angular momentum dependent term in the expression of the energy, we obtain axially symmetric WIMP velocity distributions as well. We find that some density profiles lead to approximate Maxwell-Boltzmann distributions, which are automatically defined in a finite domain, i.e. the escape velocity need not be put by hand. The role of such distributions in obtaining the direct WIMP detection rates, including the modulation, is studied in some detail and, in particular, the role of the asymmetry is explored.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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