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Mapping the dark matter halo of early-type galaxy NGC 2974 through orbit-based models with combined stellar and cold gas kinematics

文献类型：期刊论文

作者Yang, Meng1; Zhu, Ling2; Weijmans, Anne-Marie1; van de Ven, Glenn3,4; Boardman, Nicholas5; Morganti, Raffaella6,7; Oosterloo, Tom6,7
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2020
卷号491期号:3页码:4221-4231
ISSN号0035-8711
关键词galaxies: haloes galaxies: kinematics and dynamics galaxies: structure dark matter
DOI10.1093/mnras/stz3293
英文摘要We present an orbit-based method of combining stellar and cold gas kinematics to constrain the dark matter profile of early-type galaxies. We apply this method to early-type galaxy NGC 2974, using Pan-STARRS imaging and SAURON stellar kinematics tomodel the stellar orbits, and introducing HI kinematics from VLA observation as a tracer of the gravitational potential. The introduction of the cold gas kinematics shows a significant effect on the confidence limits of especially the dark halo properties: we exclude more than 95 per cent of models within the 1s confidence level of Schwarzschild modelling with only stellar kinematics, and reduce the relative uncertainty of the dark matter fraction significantly to 10 per cent within 5Re. Adopting a generalized Navarro-Frenk-White (NFW) dark matter profile, we measure a shallow cuspy inner slope of 0.6(-0.3)(+0.2) when including the cold gas kinematics in our model. We cannot constrain the inner slope with the stellar kinematics alone.
WOS关键词TO-LIGHT RATIO ; MULTI-GAUSSIAN EXPANSION ; LARGE-SCALE STRUCTURE ; ELLIPTIC GALAXY ; ATLAS(3D) PROJECT ; SAURON PROJECT ; MASS ; DYNAMICS ; NGC-2974 ; SYSTEM
资助项目China Scholarship Council (CSC) ; Scottish Universities Physics Alliance (SUPA) ; Shanghai Astronomical Observatory, Chinese Academy of Sciences[Y895201009] ; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme[724857] ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate[NNX08AR22G] ; National Science Foundation[AST-1238877]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000512306500082
资助机构China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; Scottish Universities Physics Alliance (SUPA) ; Scottish Universities Physics Alliance (SUPA) ; 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 ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate ; National Science Foundation ; National Science Foundation ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; Scottish Universities Physics Alliance (SUPA) ; Scottish Universities Physics Alliance (SUPA) ; 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 ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate ; National Science Foundation ; National Science Foundation ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; Scottish Universities Physics Alliance (SUPA) ; Scottish Universities Physics Alliance (SUPA) ; 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 ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate ; National Science Foundation ; National Science Foundation ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; Scottish Universities Physics Alliance (SUPA) ; Scottish Universities Physics Alliance (SUPA) ; 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 ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate ; National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate ; National Science Foundation ; National Science Foundation
源URL[http://ir.bao.ac.cn/handle/114a11/54002]  
专题中国科学院国家天文台
通讯作者Yang, Meng
作者单位1.Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland
2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
3.Univ Vienna, Dept Astrophys, TA 1-4 Rkenschanzstr 17, A-1180 Vienna, Austria
4.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
5.Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA
6.Netherlands Inst Radio Astron ASTRON, Postbus 2, NL-7990 AA Dwingeloo, Netherlands
7.Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands
推荐引用方式
GB/T 7714		 Yang, Meng,Zhu, Ling,Weijmans, Anne-Marie,et al. Mapping the dark matter halo of early-type galaxy NGC 2974 through orbit-based models with combined stellar and cold gas kinematics[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,491(3):4221-4231.
APA Yang, Meng.,Zhu, Ling.,Weijmans, Anne-Marie.,van de Ven, Glenn.,Boardman, Nicholas.,...&Oosterloo, Tom.(2020).Mapping the dark matter halo of early-type galaxy NGC 2974 through orbit-based models with combined stellar and cold gas kinematics.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,491(3),4221-4231.
MLA Yang, Meng,et al."Mapping the dark matter halo of early-type galaxy NGC 2974 through orbit-based models with combined stellar and cold gas kinematics".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 491.3(2020):4221-4231.

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来源：国家天文台

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