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Constraining Mass of M31 Combing Kinematics of Stars, Planetary Nebulae and Globular clusters
Yuan, Sunshun1,2; Zhu, Ling1; Liu, Cheng3; Qu, Han3; Fan, Zhou3
2022-08-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume22Issue:8Pages:14
AbstractWe construct a multiple-population discrete axisymmetric Jeans model for the Andromeda (M31) galaxy, considering three populations of kinematic tracers: 48 supergiants and 721 planetary nebulae (PNe) in the bulge and disk regions, 554 globular clusters extending to similar to 30 kpc, and halo stars extending to similar to 150 kpc of the galaxy. The three populations of tracers are organized in the same gravitational potential, while each population is allowed to have its own spatial distribution, rotation, and internal velocity anisotropy. The gravitational potential is a combination of stellar mass and a generalized NFW dark matter halo. We created two sets of models, one with a cusped dark matter halo and one with a cored dark matter halo. Both the cusped and cored model fit kinematics of all the three populations well, but the cored model is not preferred due to a too high concentration compared to that predicted from cosmological simulations. With a cusped dark matter halo, we obtained total stellar mass of 1.0 +/- 0.1 x 10(11) M (circle dot), dark matter halo virial mass of M (200) = 7.0 +/- 0.9 x 10(11) M (circle dot), virial radius of r (200) = 184 +/- 4 kpc, and concentration of c = 20 +/- 4. The mass of M31 we obtained is at the lower side of the allowed ranges in the literature and consistent with the previous results obtained from the H i rotation curve and PNe kinematics. Velocity dispersion profile of the outer stellar halo is important in constraining the total mass while it is still largely uncertain. Further proper motion of bright sources from Gaia or the Chinese Space Station Telescope might help on improving the data and lead to stronger constraints on the total mass of M31.
KeywordGalaxy: kinematics and dynamics galaxies: luminosity function mass function Galaxy: evolution
Funding OrganizationChina Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project
DOI10.1088/1674-4527/ac7af9
WOS KeywordANDROMEDA GALAXY ; UPDATED SURVEY ; MILKY-WAY ; M-31 ; HALO ; VELOCITY ; STREAM ; MERGER
Language英语
Funding ProjectChina Manned Space Project[CMS-CSST-2021-B03] ; China Manned Space Project[12033003]
Funding OrganizationChina Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project ; China Manned Space Project
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000832752500001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/87916
Collection中国科学院国家天文台
Corresponding AuthorYuan, Sunshun
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Univ Chinese Acad Sci, Dept Astron & Space Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Sunshun,Zhu, Ling,Liu, Cheng,et al. Constraining Mass of M31 Combing Kinematics of Stars, Planetary Nebulae and Globular clusters[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2022,22(8):14.
APA Yuan, Sunshun,Zhu, Ling,Liu, Cheng,Qu, Han,&Fan, Zhou.(2022).Constraining Mass of M31 Combing Kinematics of Stars, Planetary Nebulae and Globular clusters.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,22(8),14.
MLA Yuan, Sunshun,et al."Constraining Mass of M31 Combing Kinematics of Stars, Planetary Nebulae and Globular clusters".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 22.8(2022):14.
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