Constraining Mass of M31 Combing Kinematics of Stars, Planetary Nebulae and Globular clusters
文献类型：期刊论文
| 作者 | Yuan, Sunshun1,2; Zhu, Ling1; Liu, Cheng3; Qu, Han3; Fan, Zhou3 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 22期号:8页码:14 |
| 关键词 | Galaxy: kinematics and dynamics galaxies: luminosity function mass function Galaxy: evolution |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/ac7af9 |
| 英文摘要 | We 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. |
| WOS关键词 | ANDROMEDA GALAXY ; UPDATED SURVEY ; MILKY-WAY ; M-31 ; HALO ; VELOCITY ; STREAM ; MERGER |
| 资助项目 | China Manned Space Project[CMS-CSST-2021-B03] ; China Manned Space Project[12033003] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000832752500001 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| 资助机构 | 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 ; China Manned Space Project |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/87915]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Yuan, Sunshun |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：国家天文台
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