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arXiv 1104.3578astro-ph.CO
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晕生长和NFW轮廓

Halo growth and the NFW profile

Jordi Viñas, Eduard Salvador-Solé, Alberto Manrique

摘要:

我们进行了一个简单的测试表明,吸积晕增长的内部,并有密度分布,统计上无法区分的晕经历了重大的合并。测试还表明,能力的NFW的分析表达式,以适应密度分布的晕破坏对大质量在任何红移。基于这些结果,我们分析了基于数值数据的一般玩具模型和基于上述两个假设的一个物理模型在极端质量和红移域上的M-c关系,并得到了实验的证实。

英文摘要:

We perform a simple test showing that accreting halos grow inside-out and have density profiles that are statistically indistinguishable from those of halos having undergone major mergers. The test also reveals that the ability for the NFW analytical expression to fit the density profile of halos spoils towards large masses at any redshift. On view of these results, we analyze the M-c relations on extreme mass and redshift domains predicted by usual toy models based on numerical data and one physical model based on the two assumptions above confirmed by the test.

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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