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Numerical convergence of pre-initial conditions on dark matter halo properties
Zhang, Tianchi1,2; Liao, Shihong2,3; Li, Ming2; Zhang, Jiajun4
2021-11-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume507Issue:4Pages:6161-6176
AbstractGenerating pre-initial conditions (or particle loads) is the very first step to set up a cosmological N-body simulation. In this work, we revisit the numerical convergence of pre-initial conditions on dark matter halo properties using a set of simulations which only differs in initial particle loads, i.e. grid, glass, and the newly introduced capacity constrained Voronoi tessellation (CCVT). We find that the median halo properties agree fairly well (i.e. within a convergence level of a few per cent) among simulations running from different initial loads. We also notice that for some individual haloes cross-matched among different simulations, the relative difference of their properties sometimes can be several tens of per cent. By looking at the evolution history of these poorly converged haloes, we find that they are usually merging haloes or haloes have experienced recent merger events, and their merging processes in different simulations are out-of-sync, making the convergence of halo properties become poor temporarily. We show that, comparing to the simulation starting with an anisotropic grid load, the simulation with an isotropic CCVT load converges slightly better to the simulation with a glass load, which is also isotropic. Among simulations with different pre-initial conditions, haloes in higher density environments tend to have their properties converged slightly better. Our results confirm that CCVT loads behave as well as the widely used grid and glass loads at small scales, and for the first time we quantify the convergence of two independent isotropic particle loads (i.e. glass and CCVT) on halo properties.
Keywordmethods: numerical dark matter large-scale structure of Universe
Funding OrganizationNSFC ; NSFC ; European Research Council via ERC Consolidator Grant KETJU ; European Research Council via ERC Consolidator Grant KETJU ; IBS ; IBS ; NSFC ; NSFC ; European Research Council via ERC Consolidator Grant KETJU ; European Research Council via ERC Consolidator Grant KETJU ; IBS ; IBS ; NSFC ; NSFC ; European Research Council via ERC Consolidator Grant KETJU ; European Research Council via ERC Consolidator Grant KETJU ; IBS ; IBS ; NSFC ; NSFC ; European Research Council via ERC Consolidator Grant KETJU ; European Research Council via ERC Consolidator Grant KETJU ; IBS ; IBS
DOI10.1093/mnras/stab2543
WOS KeywordMISSING SATELLITES ; SIMULATIONS ; EVOLUTION ; SUBHALOES ; CLUSTERS ; PROFILE ; CODE
Language英语
Funding ProjectNSFC[11903043] ; NSFC[11988101] ; European Research Council via ERC Consolidator Grant KETJU[818930] ; IBS[IBS-R018-D1]
Funding OrganizationNSFC ; NSFC ; European Research Council via ERC Consolidator Grant KETJU ; European Research Council via ERC Consolidator Grant KETJU ; IBS ; IBS ; NSFC ; NSFC ; European Research Council via ERC Consolidator Grant KETJU ; European Research Council via ERC Consolidator Grant KETJU ; IBS ; IBS ; NSFC ; NSFC ; European Research Council via ERC Consolidator Grant KETJU ; European Research Council via ERC Consolidator Grant KETJU ; IBS ; IBS ; NSFC ; NSFC ; European Research Council via ERC Consolidator Grant KETJU ; European Research Council via ERC Consolidator Grant KETJU ; IBS ; IBS
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000702151300101
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75113
Collection中国科学院国家天文台
Corresponding AuthorZhang, Tianchi
Affiliation1.Beijing Acad Sci & Technol, Beijing Planetarium, Beijing 100044, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100012, Peoples R China
3.Univ Helsinki, Dept Phys, Gustaf Hallstromin Katu 2, FI-00014 Helsinki, Finland
4.Inst Basic Sci IBS, Ctr Theoret Phys Universe, Daejeon 34126, South Korea
Recommended Citation
GB/T 7714
Zhang, Tianchi,Liao, Shihong,Li, Ming,et al. Numerical convergence of pre-initial conditions on dark matter halo properties[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,507(4):6161-6176.
APA Zhang, Tianchi,Liao, Shihong,Li, Ming,&Zhang, Jiajun.(2021).Numerical convergence of pre-initial conditions on dark matter halo properties.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,507(4),6161-6176.
MLA Zhang, Tianchi,et al."Numerical convergence of pre-initial conditions on dark matter halo properties".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 507.4(2021):6161-6176.
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