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A discrete chemo-dynamical model of M87's globular clusters: Kinematics extending to similar to 400 kpc

文献类型：期刊论文

作者Li, Chao1,2; Zhu, Ling3; Long, R. J.1,4,5,6; Mao, Shude1,4,5; Peng, Eric W.7,8; Sarzi, Marc9,10; van de Ven, Glenn11; Zhang, Hongxin12; Guo, Rui1,2; Xue, Xiangxiang1
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2020-02-01
卷号492期号:2页码:2775-2795
ISSN号0035-8711
关键词galaxies: individual: M87 galaxies: kinematics and dynamics
DOI10.1093/mnras/staa027
英文摘要We study the mass distribution and kinematics of the giant elliptical galaxy M87 (NGC 4486) using discrete chemo-dynamical, axisymmetric Jeans equation modelling. Our catalogue comprises 894 globular clusters (GCs) extending to a projected radius of similar to 430 kpc with line-of-sight velocities and colours, and Multi Unit Spectroscopic Explorer integral field unit data within the central 2.4 kpc of the main galaxy. The gravitational potential for our models is a combination of a luminous matter potential with a varying mass-to-light ratio for the main galaxy, a supermassive black hole and a dark matter (DM) potential with a cusped or cored DM halo. The best-fitting models with either a cusped or a cored DM halo show no significant differences and both are acceptable. We obtain a total mass of (2.16 +/- 0.38) x 10(13) M-circle dot within similar to 400 kpc. By including the stellar mass-to-light ratio gradient, the DM fraction increases from similar to 26 per cent (with no gradient) to similar to 73 per cent within 1 R-e(maj) (major axis of half-light isophote, 14.2 kpc), and from similar to 84 per cent to similar to 94 per cent within 5 R-e(maj) (71.2 kpc). Red GCs have moderate rotation with V-max/sigma similar to 0.4, and blue GCs have weak rotation with V-max/sigma similar to 0.1. Red GCs have tangential velocity dispersion anisotropy, while blue GCs are consistent with being nearly isotropic. Our results suggest that red GCs are more likely to be born in situ, while blue GCs are more likely to be accreted.
WOS关键词EARLY-TYPE GALAXIES ; MULTI-GAUSSIAN EXPANSION ; ACS-VIRGO CLUSTER ; TO-LIGHT RATIO ; DARK-MATTER ; DYNAMICAL EVOLUTION ; ELLIPTIC GALAXIES ; MASS ; PROJECT ; ANISOTROPY
资助项目National Key Basic Research and Development Program of China[2018YFA0404501] ; National Science Foundation of China[11821303] ; National Science Foundation of China[11333003] ; National Science Foundation of China[11390372] ; National Science Foundation of China[11761131004] ; Shanghai Astronomical Observatory, Chinese Academy of Sciences[Y895201009] ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme[724857] ; Centre National d'etudes Spatiales, CNES
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000512297600091
资助机构National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; Centre National d'etudes Spatiales, CNES ; Centre National d'etudes Spatiales, CNES ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; Centre National d'etudes Spatiales, CNES ; Centre National d'etudes Spatiales, CNES ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; Centre National d'etudes Spatiales, CNES ; Centre National d'etudes Spatiales, CNES ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; Shanghai Astronomical Observatory, Chinese Academy of Sciences ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme ; Centre National d'etudes Spatiales, CNES ; Centre National d'etudes Spatiales, CNES
源URL[http://ir.bao.ac.cn/handle/114a11/54242]  
专题中国科学院国家天文台
通讯作者Li, Chao; Zhu, Ling
作者单位1.Chinese Acad Sci, Natl Astron Observ, A 20 Datun Rd, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
4.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China
5.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China
6.Univ Manchester, Dept Phys & Astron, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England
7.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
8.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
9.Armagh Observ & Planetarium, Coll Hill, Armagh BT61 9DG, North Ireland
10.Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL1 9AB, Herts, England
推荐引用方式
GB/T 7714		 Li, Chao,Zhu, Ling,Long, R. J.,et al. A discrete chemo-dynamical model of M87's globular clusters: Kinematics extending to similar to 400 kpc[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,492(2):2775-2795.
APA Li, Chao.,Zhu, Ling.,Long, R. J..,Mao, Shude.,Peng, Eric W..,...&Ko, Youkyung.(2020).A discrete chemo-dynamical model of M87's globular clusters: Kinematics extending to similar to 400 kpc.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,492(2),2775-2795.
MLA Li, Chao,et al."A discrete chemo-dynamical model of M87's globular clusters: Kinematics extending to similar to 400 kpc".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 492.2(2020):2775-2795.

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