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Hu, B; Liu, XW; Cai, RG
CHAM: a fast algorithm of modelling non-linear matter power spectrum in the sCreened HAlo Model
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Language英语
AbstractWe 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).
2018
ISSN0035-8711
Volume476Issue:1Pages:L65-L68
Subject AreaAstronomy & Astrophysics
MOST Discipline CatalogueAstronomy & Astrophysics
DOI10.1093/mnrasl/sly032
Indexed BySCIE
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/22909
Collection理论物理所科研产出_SCI论文
Affiliation1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
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Hu, B,Liu, XW,Cai, RG. 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 Hu, B,Liu, XW,&Cai, RG.(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 Hu, B,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.
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