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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1801.02547astro-ph.CO
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计算晕丰度的一种新的光滑- $k$空间滤波方法

A new smooth-$k$ space filter approach to calculate halo abundances

Matteo Leo, Carlton M. Baugh, Baojiu Li, Silvia Pascoli

摘要:

我们提出了一种新的过滤器,一个光滑的$k$空间过滤器,使用在Press-Schechter方法来模拟的暗物质晕质量函数,克服了其他过滤器的缺点。我们测试这对N体模拟中测量的质量函数。我们发现,常用的夏普- $k$过滤器无法再现的晕质量函数的行为在低质量的线性功率谱的急剧截断模型的模拟测量。我们表明,我们的新的过滤器的预测同意在更广泛的范围内的晕质量的阻尼和无阻尼功率谱的模拟结果比的情况下,与尖锐的$k$和实空间顶帽过滤器。

英文摘要:

We propose a new filter, a smooth-$k$ space filter, to use in the Press-Schechter approach to model the dark matter halo mass function which overcomes shortcomings of other filters. We test this against the mass function measured in N-body simulations. We find that the commonly used sharp-$k$ filter fails to reproduce the behaviour of the halo mass function at low masses measured from simulations of models with a sharp truncation in the linear power spectrum. We show that the predictions with our new filter agree with the simulation results over a wider range of halo masses for both damped and undamped power spectra than is the case with the sharp-$k$ and real-space top-hat filters.

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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