Extending the halo mass resolution of N-body simulations
Extending the halo mass resolution of N-body simulations
复制标题
扩展 N 体模拟的光晕质量分辨率
DOI:
10.1093/mnras/stu1084
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发表时间:
2014
影响因子:
4.8
通讯作者:
Angulo R
中科院分区:
文献类型:
--
作者:
Angulo R
We present a scheme to extend the halo mass resolution of dark matterN-body simulations. The method uses the simulated density field to predict the number of sub-resolution haloes expected in different regions, taking as input the abundance and the bias factors of haloes of a given mass. These quantities can be computed analytically or measured from higher resolution simulations. We show that the method recovers the abundance and clustering in real- and redshift-space of haloes with mass below ∼7.5 × 1013h−1M⊙atz= 0 to better than 10 per cent. By applying the method to an ensemble of 50 low-resolution, large-volume simulations, we compute the expected correlation function and covariance matrix of luminous red galaxies (LRGs), which we compare to state-of-the-art baryonic acoustic oscillation measurements. The original simulations resolve just two-thirds of the LRG population, so we extend their resolution by a factor of 30 in halo mass in order to recover all LRGs. Using our method, it is now feasible to build the large numbers of high-resolution large volume mock galaxy catalogues required to compute the covariance matrices necessary to analyse upcoming galaxy surveys designed to probe dark energy.
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DOI:
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发表时间:
1998
期刊:
影响因子:
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作者:
S. Cole;S. Hatton;D. Weinberg;C. Frenk
通讯作者:
C. Frenk
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1111/j.1365-2966.2008.13179.x
发表时间:
2008
影响因子:
4.8
作者:
Almeida C
通讯作者:
Almeida C
DOI:
10.1098/rsta.2008.0192
发表时间:
2008
期刊:
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子:
--
作者:
C. Baugh
通讯作者:
C. Baugh
DOI:
10.1111/j.1365-2966.2008.13769.x
发表时间:
2008
影响因子:
4.8
作者:
A. Sánchez;C. Baugh;Raul Angulo Mpe;Garching;Germany;Icc;Durham;Uk
通讯作者:
Uk