Modelling the clustering of dark matter haloes in resummed perturbation theories

Modelling the clustering of dark matter haloes in resummed perturbation theories
复制标题

在恢复微扰理论中模拟暗物质晕的聚集

DOI:
10.1111/j.1365-2966.2011.18761.x
复制
发表时间:
2011
影响因子:
4.8
通讯作者:
S. Matarrese
S. Matarrese
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
A. Elia;S. Kulkarni;C. Porciani;M. Pietroni;S. Matarrese

文献摘要

参考文献

被引文献

相似文献

我们解决问题的宇宙学偏差之间的物质和星系分布,寻找暗物质晕作为第一步,以表征星系聚类。从高红移的线性密度场开始,我们沿着物质的质心轨迹,这些物质将在后期形成每个晕(原晕)。我们采用了流体般的描述扰动的演化在原晕分布,这是耦合到物质密度场通过重力。我们提出的密度和速度场的解析解,在重整化微扰理论的背景下。我们从线性解开始,然后计算传播子和功率谱的单圈校正。最后,我们解析地求和传播子,并使用适当的时间重整化群方法来求和功率谱。对于晕质量M <1014 h − 1 M,我们的结果在z = 0时与N体模拟结果符合得很好。我们的模型能够预测晕物质的交叉光谱,准确度为5%,最高可达0.1hMpc-1,接近未来星系红移调查的要求。
We address the issue of the cosmological bias between matter and galaxy distributions, looking at dark matter haloes as a first step to characterize galaxy clustering. Starting from the linear density field at high redshift, we follow the centre-of-mass trajectory of the material that will form each halo at late times (protohalo). We adopt a fluid-like description for the evolution of perturbations in the protohalo distribution, which is coupled to the matter density field via gravity. We present analytical solutions for the density and velocity fields, in the context of renormalized perturbation theory. We start from the linear solution, then compute one-loop corrections for the propagator and the power spectrum. Finally, we analytically resum the propagator, and we use a suitable extension of the time-renormalization-group method to resum the power spectrum. For halo massesM< 1014h−1M⊙, our results atz= 0 are in good agreement withN-body simulations. Our model is able to predict the halo–matter cross-spectrum with an accuracy of 5 per cent up tok≈ 0.1hMpc−1approaching the requirements of future galaxy redshift surveys.
拉格朗日空间中的暗物质晕如何聚集
DOI: --
发表时间: 1998
期刊:
影响因子: --
作者:
C. Porciani;P. Catelan;C. Lacey
通讯作者: C. Lacey
DOI: 10.1111/j.1365-2966.2006.11385.x
发表时间: 2006
影响因子: 4.8
作者:
J. Guzik;G. Bernstein;R. Smith
通讯作者: R. Smith
偏置星系形成的两种方式
DOI: 10.1046/j.1365-8711.2000.04023.x
发表时间: 2000
影响因子: 4.8
作者:
P. Catelan;C. Porciani;M. Kamionkowski
通讯作者: M. Kamionkowski
CDM宇宙学中的宇宙背景各向异性
DOI: 10.1086/192220
发表时间: 1994
影响因子: 6.4
作者:
N. Sugiyama
通讯作者: N. Sugiyama
尺度相关偏差和光环模型
DOI: 10.1016/j.astropartphys.2005.11.007
发表时间: 2005
影响因子: 3.5
作者:
A. Schulz;M. White
通讯作者: M. White