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HIKER: a halo-finding method based on kernel-shift algorithm

文献类型：期刊论文

作者Sun Shuang-Peng2,3; Liao Shi-Hong2; Guo Qi2,3; Wang Qiao2,3; Gao Liang1,2,3
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2020-04-01
卷号20期号:4页码:12
关键词methods N-body simulations galaxies halos galaxies evolution cosmology theory dark matter
ISSN号1674-4527
DOI10.1088/1674-4527/20/4/46
英文摘要We introduce a new halo/subhalo finder, HIKER (a Halo fInder based on KERnel-shift algorithm), which takes advantage of a machine learning method - the mean-shift algorithm combined with the Plummer kernel function, to effectively locate density peaks corresponding to halos/subhalos in density field. Based on these density peaks, dark matter halos are identified as spherical overdensity structures, and subhalos are bound substructures with boundaries at their tidal radius. By testing HIKER code with mock halos, we show that HIKER performs excellently in recovering input halo properties. In particular, HIKER has higher accuracy in locating halo/subhalo centres than most halo finders. With cosmological simulations, we further show that HIKER reproduces the abundance of dark matter halos and subhalos quite accurately, and the HIKER halo/subhalo mass functions and V-max functions are in good agreement with two widely used halo finders, SUBFIND and AHF.
WOS关键词LARGE-SCALE STRUCTURE ; DARK-MATTER ; MASS FUNCTION ; MEAN SHIFT ; UNIVERSE ; SUBHALOES ; GALAXIES ; ENERGY ; MODELS ; TREES
资助项目National Key Program for Science and Technology Research and Development[2017YFB0203300] ; National Natural Science Foundation of China (NSFC)[11425312] ; Royal Society Newton Advanced Fellowships ; NSFC[11573033] ; NSFC[11622325] ; "Recruitment Program of Global Youth Experts" of China ; NAOC grant[Y434011V01]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000529927800001
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
资助机构National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Royal Society Newton Advanced Fellowships ; Royal Society Newton Advanced Fellowships ; NSFC ; NSFC ; "Recruitment Program of Global Youth Experts" of China ; "Recruitment Program of Global Youth Experts" of China ; NAOC grant ; NAOC grant ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Royal Society Newton Advanced Fellowships ; Royal Society Newton Advanced Fellowships ; NSFC ; NSFC ; "Recruitment Program of Global Youth Experts" of China ; "Recruitment Program of Global Youth Experts" of China ; NAOC grant ; NAOC grant ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Royal Society Newton Advanced Fellowships ; Royal Society Newton Advanced Fellowships ; NSFC ; NSFC ; "Recruitment Program of Global Youth Experts" of China ; "Recruitment Program of Global Youth Experts" of China ; NAOC grant ; NAOC grant ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Royal Society Newton Advanced Fellowships ; Royal Society Newton Advanced Fellowships ; NSFC ; NSFC ; "Recruitment Program of Global Youth Experts" of China ; "Recruitment Program of Global Youth Experts" of China ; NAOC grant ; NAOC grant
源URL[http://ir.bao.ac.cn/handle/114a11/55218]  
专题中国科学院国家天文台
通讯作者Sun Shuang-Peng
作者单位1.Univ Durham, Inst Computat Cosmol, Dept Phys, Sci Labs, South Rd, Durham DH1 3LE, England
2.Chinese Acad Sci, Key Lab Computat Astrophys, Natl Astron Observ, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Sun Shuang-Peng,Liao Shi-Hong,Guo Qi,et al. HIKER: a halo-finding method based on kernel-shift algorithm[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(4):12.
APA Sun Shuang-Peng,Liao Shi-Hong,Guo Qi,Wang Qiao,&Gao Liang.(2020).HIKER: a halo-finding method based on kernel-shift algorithm.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(4),12.
MLA Sun Shuang-Peng,et al."HIKER: a halo-finding method based on kernel-shift algorithm".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.4(2020):12.

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来源：国家天文台

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