NAOC Open IR
The mass of the Milky Way out to 100 kpc using halo stars
Deason, Alis J.1,2; Erkal, Denis3; Belokurov, Vasily4; Fattahi, Azadeh1; Gomez, Facundo A.5,6; Grand, Robert J. J.7; Pakmor, Rudiger7; Xue, Xiang-Xiang8; Liu, Chao9; Yang, Chengqun10; Zhang, Lan8; Zhao, Gang8
2021-03-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume501Issue:4Pages:5964-5972
AbstractWe use a distribution function analysis to estimate the mass of the Milky Way (MW) out to 100 kpc using a large sample of halo stars. These stars are compiled from the literature, and the vast majority (similar to 98 per cent) have 6D phase-space information. We pay particular attention to systematic effects, such as the dynamical influence of the Large Magellanic Cloud (LMC), and the effect of unrelaxed substructure. The LMC biases the (pre-LMC infall) halo mass estimates towards higher values, while realistic stellar haloes from cosmological simulations tend to underestimate the true halo mass. After applying our method to the MW data, we find a mass within 100 kpc of M (<100 kpc) = 6.07 +/- 0.29 (stat.) +/- 1.21 (sys.) x 10(11)M(circle dot). For this estimate, we have approximately corrected for the reflex motion induced by the LMC using the Erkal et al. model, which assumes a rigid potential for the LMC and MW. Furthermore, stars that likely belong to the Sagittarius stream are removed, and we include a 5 per cent systematic bias, and a 20 per cent systematic uncertainty based on our tests with cosmological simulations. Assuming the mass-concentration relation for Navarro-Frenk-White haloes, our mass estimate favours a total (pre-LMC infall) MW mass of M-200c = 1.01 +/- 0.24 x 10(12)M(circle dot), or (post-LMC infall) mass of M-200c = 1.16 +/- 0.24 x 10(12) M-circle dot when a 1.5 x 10(11)M(circle dot) mass of a rigid LMC is included.
KeywordGalaxy: halo Galaxy: kinematics and dynamics Local Group
Funding OrganizationRoyal Society University Research Fellowship ; Royal Society University Research Fellowship ; Leverhulme Trust ; Leverhulme Trust ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; CONICYT through the project FONDECYT Regular ; CONICYT through the project FONDECYT Regular ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; BEIS capital funding via STFC capital grants ; BEIS capital funding via STFC capital grants ; Durham University ; Durham University ; STFC operations grant ; STFC operations grant ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; Leverhulme Trust ; Leverhulme Trust ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; CONICYT through the project FONDECYT Regular ; CONICYT through the project FONDECYT Regular ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; BEIS capital funding via STFC capital grants ; BEIS capital funding via STFC capital grants ; Durham University ; Durham University ; STFC operations grant ; STFC operations grant ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; Leverhulme Trust ; Leverhulme Trust ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; CONICYT through the project FONDECYT Regular ; CONICYT through the project FONDECYT Regular ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; BEIS capital funding via STFC capital grants ; BEIS capital funding via STFC capital grants ; Durham University ; Durham University ; STFC operations grant ; STFC operations grant ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; Leverhulme Trust ; Leverhulme Trust ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; CONICYT through the project FONDECYT Regular ; CONICYT through the project FONDECYT Regular ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; BEIS capital funding via STFC capital grants ; BEIS capital funding via STFC capital grants ; Durham University ; Durham University ; STFC operations grant ; STFC operations grant
DOI10.1093/mnras/staa3984
Language英语
Funding ProjectRoyal Society University Research Fellowship ; Leverhulme Trust ; Science and Technology Facilities Council (STFC)[ST/P000541/1] ; Science and Technology Facilities Council (STFC)[ST/T000244/1] ; CONICYT through the project FONDECYT Regular[1181264] ; Max Planck Society ; National Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11873052] ; National Natural Science Foundation of China[11873057] ; National Natural Science Foundation of China[11890694] ; National Natural Science Foundation of China[11773033] ; National Key R&D Program of China[2019YFA0405500] ; BEIS capital funding via STFC capital grants[ST/K00042X/1] ; BEIS capital funding via STFC capital grants[ST/P002293/1] ; BEIS capital funding via STFC capital grants[ST/R002371/1] ; BEIS capital funding via STFC capital grants[ST/S002502/1] ; Durham University ; STFC operations grant[ST/R000832/1]
Funding OrganizationRoyal Society University Research Fellowship ; Royal Society University Research Fellowship ; Leverhulme Trust ; Leverhulme Trust ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; CONICYT through the project FONDECYT Regular ; CONICYT through the project FONDECYT Regular ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; BEIS capital funding via STFC capital grants ; BEIS capital funding via STFC capital grants ; Durham University ; Durham University ; STFC operations grant ; STFC operations grant ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; Leverhulme Trust ; Leverhulme Trust ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; CONICYT through the project FONDECYT Regular ; CONICYT through the project FONDECYT Regular ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; BEIS capital funding via STFC capital grants ; BEIS capital funding via STFC capital grants ; Durham University ; Durham University ; STFC operations grant ; STFC operations grant ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; Leverhulme Trust ; Leverhulme Trust ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; CONICYT through the project FONDECYT Regular ; CONICYT through the project FONDECYT Regular ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; BEIS capital funding via STFC capital grants ; BEIS capital funding via STFC capital grants ; Durham University ; Durham University ; STFC operations grant ; STFC operations grant ; Royal Society University Research Fellowship ; Royal Society University Research Fellowship ; Leverhulme Trust ; Leverhulme Trust ; Science and Technology Facilities Council (STFC) ; Science and Technology Facilities Council (STFC) ; CONICYT through the project FONDECYT Regular ; CONICYT through the project FONDECYT Regular ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; BEIS capital funding via STFC capital grants ; BEIS capital funding via STFC capital grants ; Durham University ; Durham University ; STFC operations grant ; STFC operations grant
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000637320000087
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78298
Collection中国科学院国家天文台
Corresponding AuthorDeason, Alis J.
Affiliation1.Univ Durham, Inst Computat Cosmol, Dept Phys, South Rd, Durham DH1 3LE, England
2.Univ Durham, Ctr Extragalact Astron, Dept Phys, South Rd, Durham DH1 3LE, England
3.Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England
4.Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
5.Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, Raul Bitran 1305, La Serena, Chile
6.Univ La Serena, Dept Astron, Av Juan Cisternas 1200 Norte, La Serena, Chile
7.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany
8.Natl Astron Observ, Key Lab Opt Astron, CAS, Beijing 100101, Peoples R China
9.Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100101, Peoples R China
10.Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Deason, Alis J.,Erkal, Denis,Belokurov, Vasily,et al. The mass of the Milky Way out to 100 kpc using halo stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,501(4):5964-5972.
APA Deason, Alis J..,Erkal, Denis.,Belokurov, Vasily.,Fattahi, Azadeh.,Gomez, Facundo A..,...&Zhao, Gang.(2021).The mass of the Milky Way out to 100 kpc using halo stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,501(4),5964-5972.
MLA Deason, Alis J.,et al."The mass of the Milky Way out to 100 kpc using halo stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 501.4(2021):5964-5972.
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