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arXiv 1204.3532astro-ph.CO
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空洞模型中的晕丰度和剪切

Halo abundances and shear in void models

David Alonso, Juan García-Bellido, Troels Haugboelle, Alexander Knebe

摘要:

通过数值模拟Lemaitre-Tolman-Bondi空洞模型,研究了暗物质的非线性引力坍缩过程.我们扩展晕质量函数形式主义,这些模型在一个一致的方式。这种扩展不仅在所有时间和半径上与模拟数据进行了比较,而且还提供了关于背景切变对扰动增长的影响的有趣线索。我们的研究结果提示,通过集群数量计数,这可能会产生强烈的约束一般非均匀模型,任何规模的背景剪切约束的可能性。

英文摘要:

We study the non-linear gravitational collapse of dark matter into halos through numerical N-body simulations of Lemaitre-Tolman-Bondi void models. We extend the halo mass function formalism to these models in a consistent way. This extension not only compares well with the simulated data at all times and radii, but it also gives interesting clues about the impact of the background shear on the growth of perturbations. Our results give hints about the possibility of constraining the background shear via cluster number counts, which could then give rise to strong constraints on general inhomogeneous models, of any scale.

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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