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arXiv 0906.4340astro-ph.COastro-ph.GA
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冷暗物质晕的结构和演化

The structure and evolution of cold dark matter halos

Jürg Diemand, Ben Moore

摘要:

在标准宇宙学模型中,一种神秘的冷暗物质(CDM)成分主导着结构的形成。CDM晕形成的数值研究已经产生了一些强大的结果,允许独特的测试的层次聚类范式。从矮星系到星系团,晕的普遍性质,包括它们的质量分布和亚结构性质与观测数据大致一致。解析晕的精细结构使我们能够对正在进行的和计划中的直接和间接暗物质探测实验进行预测。虽然纯CDM晕的模拟现在非常准确,并且一致性很好(最近声称的差异在本文中详细讨论),但我们仍然无法对星系形成以及暗物质分布在此过程中的变化做出可靠的定量预测。虽然观测和模拟之间的差异一直是文献中争论不休的主题,但为了充分测试CDM范式,需要更详细地了解星系形成和演化。无论暗物质粒子的真实性质是什么,它的成团性质必须与冷中性伴子粒子没有太大的不同,以保持模型在匹配大尺度结构数据和晕的整体性质方面的所有成功,这些数据大多与观测结果吻合得很好。

英文摘要:

In the standard cosmological model a mysterious cold dark matter (CDM) component dominates the formation of structures. Numerical studies of the formation of CDM halos have produced several robust results that allow unique tests of the hierarchical clustering paradigm. Universal properties of halos, including their mass profiles and substructure properties are roughly consistent with observational data from the scales of dwarf galaxies to galaxy clusters. Resolving the fine grained structure of halos has enabled us to make predictions for ongoing and planned direct and indirect dark matter detection experiments. While simulations of pure CDM halos are now very accurate and in good agreement (recently claimed discrepancies are addressed in detail in this review), we are still unable to make robust, quantitative predictions about galaxy formation and about how the dark matter distribution changes in the process. Whilst discrepancies between observations and simulations have been the subject of much debate in the literature, galaxy formation and evolution needs to be understood in more detail in order to fully test the CDM paradigm. Whatever the true nature of the dark matter particle is, its clustering properties must not be too different from a cold neutralino like particle to maintain all the successes of the model in matching large scale structure data and the global properties of halos which are mostly in good agreement with observations.

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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