NAOC Open IR  > 星系宇宙学研究部
Speeding up N-body simulations of modified gravity: chameleon screening models
Bose, Sownak1; Li, Baojiu1; Barreira, Alexandre2; He, Jian-hua1; Hellwing, Wojciech A.3,4; Koyama, Kazuya3; Llinares, Claudio1; Zhao, Gong-Bo3,5
2017-02-01
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Issue2
AbstractWe describe and demonstrate the potential of a new and very efficient method for simulating certain classes of modified gravity theories, such as the widely studied f(R) gravity models. High resolution simulations for such models are currently very slow due to the highly nonlinear partial differential equation that needs to be solved exactly to predict the modified gravitational force. This nonlinearity is partly inherent, but is also exacerbated by the specific numerical algorithm used, which employs a variable redefinition to prevent numerical instabilities. The standard Newton-Gauss-Seidel iterative method used to tackle this problem has a poor convergence rate. Our new method not only avoids this, but also allows the discretised equation to be written in a form that is analytically solvable. We show that this new method greatly improves the performance and efficiency of f(R) simulations. For example, a test simulation with 512(3) particles in a box of size 512 Mpc/h is now 5 times faster than before, while a Millennium-resolution simulation for f(R) gravity is estimated to be more than 20 times faster than with the old method. Our new implementation will be particularly useful for running very high resolution, large-sized simulations which, to date, are only possible for the standard model, and also makes it feasible to run large numbers of lower resolution simulations for covariance analyses. We hope that the method will bring us to a new era for precision cosmological tests of gravity.
SubtypeArticle
KeywordCosmological Simulations Dark Matter Simulations Modified Gravity
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationSTFC(ST/K501979/1 ; STFC(ST/K501979/1 ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; European Research Council(646702) ; European Research Council(646702) ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; Australian Government ; Australian Government ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; Durham University ; Durham University ; National Science Foundation(PHY-1066293) ; National Science Foundation(PHY-1066293) ; ST/L00075X/1 ; ST/L00075X/1 ; RF040365 ; RF040365 ; ST/N000668/1 ; ST/N000668/1 ; ST/H008519/1 ; ST/H008519/1 ; ST/K003267/1) ; ST/K003267/1) ; STFC(ST/K501979/1 ; STFC(ST/K501979/1 ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; European Research Council(646702) ; European Research Council(646702) ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; Australian Government ; Australian Government ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; Durham University ; Durham University ; National Science Foundation(PHY-1066293) ; National Science Foundation(PHY-1066293) ; ST/L00075X/1 ; ST/L00075X/1 ; RF040365 ; RF040365 ; ST/N000668/1 ; ST/N000668/1 ; ST/H008519/1 ; ST/H008519/1 ; ST/K003267/1) ; ST/K003267/1)
DOI10.1088/1475-7516/2017/02/050
WOS KeywordF(R) GRAVITY ; HUBBLE CONSTANT ; POWER SPECTRA ; DARK ENERGY ; LOCAL GROUP ; GALAXIES ; SPACE ; CODE ; CONSTRAINTS ; COSMOLOGY
Indexed BySCI
Language英语
Funding OrganizationSTFC(ST/K501979/1 ; STFC(ST/K501979/1 ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; European Research Council(646702) ; European Research Council(646702) ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; Australian Government ; Australian Government ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; Durham University ; Durham University ; National Science Foundation(PHY-1066293) ; National Science Foundation(PHY-1066293) ; ST/L00075X/1 ; ST/L00075X/1 ; RF040365 ; RF040365 ; ST/N000668/1 ; ST/N000668/1 ; ST/H008519/1 ; ST/H008519/1 ; ST/K003267/1) ; ST/K003267/1) ; STFC(ST/K501979/1 ; STFC(ST/K501979/1 ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; Polish National Science Center(UMO-2012/07/D/ST9/02785) ; European Research Council(646702) ; European Research Council(646702) ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; University of Queensland - University of Western Australia Bilateral Research Collaboration Award ; Australian Government ; Australian Government ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; BIS National E-Infrastructure Capital grant(ST/K00042X/1) ; Durham University ; Durham University ; National Science Foundation(PHY-1066293) ; National Science Foundation(PHY-1066293) ; ST/L00075X/1 ; ST/L00075X/1 ; RF040365 ; RF040365 ; ST/N000668/1 ; ST/N000668/1 ; ST/H008519/1 ; ST/H008519/1 ; ST/K003267/1) ; ST/K003267/1)
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000399455000050
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8388
Collection星系宇宙学研究部
Affiliation1.Univ Durham, Dept Phys, Inst Computat Cosmol, Durham DH1 3LE, England
2.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany
3.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England
4.Univ Zielona Gora, Janusz Gil Inst Astron, Ul Szafrana 2, PL-65516 Zielona Gora, Poland
5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Bose, Sownak,Li, Baojiu,Barreira, Alexandre,et al. Speeding up N-body simulations of modified gravity: chameleon screening models[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2017(2).
APA Bose, Sownak.,Li, Baojiu.,Barreira, Alexandre.,He, Jian-hua.,Hellwing, Wojciech A..,...&Zhao, Gong-Bo.(2017).Speeding up N-body simulations of modified gravity: chameleon screening models.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2).
MLA Bose, Sownak,et al."Speeding up N-body simulations of modified gravity: chameleon screening models".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .2(2017).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Bose, Sownak]'s Articles
[Li, Baojiu]'s Articles
[Barreira, Alexandre]'s Articles
Baidu academic
Similar articles in Baidu academic
[Bose, Sownak]'s Articles
[Li, Baojiu]'s Articles
[Barreira, Alexandre]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Bose, Sownak]'s Articles
[Li, Baojiu]'s Articles
[Barreira, Alexandre]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.