CHAM: a fast algorithm of modelling non-linear matter power spectrum in the sCreened HAlo Model

doi:10.1093/mnrasl/sly032

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	CHAM: a fast algorithm of modelling non-linear matter power spectrum in the sCreened HAlo Model
	Cai, RG; Hu, B ; Liu, XW
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018
卷号	476 期号:1 页码:L65-L68
ISSN号	0035-8711
DOI	10.1093/mnrasl/sly032
英文摘要	We present a fast numerical screened halo model algorithm (CHAM, which stands for the sCreened HAlo Model) for modelling non-linear power spectrum for the alternative models to Lambda cold dark matter. This method has three obvious advantages. First of all, it is not being restricted to a specific dark energy/modified gravity model. In principle, all of the screened scalar-tensor theories can be applied. Secondly, the least assumptions are made in the calculation. Hence, the physical picture is very easily understandable. Thirdly, it is very predictable and does not rely on the calibration from N-body simulation. As an example, we show the case of the Hu-Sawicki f(R) gravity. In this case, the typical CPU time with the current parallel PYTHON script (eight threads) is roughly within 10 min. The resulting spectra are in a good agreement with N-body data within a few percentage accuracy up to k similar to 1 h Mpc(-1).
学科主题	Astronomy & Astrophysics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/22909]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Cai, RG,Hu, B,Liu, XW. CHAM: a fast algorithm of modelling non-linear matter power spectrum in the sCreened HAlo Model[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,476(1):L65-L68.
APA	Cai, RG,Hu, B,&Liu, XW.(2018).CHAM: a fast algorithm of modelling non-linear matter power spectrum in the sCreened HAlo Model.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,476(1),L65-L68.
MLA	Cai, RG,et al."CHAM: a fast algorithm of modelling non-linear matter power spectrum in the sCreened HAlo Model".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 476.1(2018):L65-L68.