How close dark matter haloes and MOND are to each other: three-dimensional tests based on Gaia DR2(star)
文献类型:期刊论文
作者 | Zhu, Yongda9; Ma, Hai-Xia8; Dong XB(董小波)7; Huang, Yang5,6; Mistele, Tobias4; Peng, Bo2,3; Long Q(龙潜)7; Wang, Tianqi1,2; Chang L(常亮)7; Jin, Xi2 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2023-01-09 |
卷号 | 519期号:3页码:4479-4498 |
ISSN号 | 0035-8711 |
关键词 | gravitation Galaxy: halo Galaxy: kinematics and dynamics dark matter |
DOI | 10.1093/mnras/stac3483 |
产权排序 | 第3完成单位 |
文献子类 | Article |
英文摘要 | Aiming at discriminating different gravitational potential models of the Milky Way, we perform tests based on the kinematic data powered by the Gaia DR2 astrometry over a large range of (R, z) locations. Invoking the complete form of Jeans equations that admit three integrals of motion, we use the independent R- and z-directional equations as two discriminators (T-R and T-z). We apply the formula for spatial distributions of radial and vertical velocity dispersions proposed by Binney et al., and successfully extend it to azimuthal components, sigma(theta)(R, z) and V-theta(R, z); the analytic form avoids the numerical artifacts caused by numerical differentiation in Jeans-equations calculation given the limited spatial resolutions of observations, and more importantly reduces the impact of kinematic substructures in the Galactic disc. It turns out that whereas the current kinematic data are able to reject Moffat's Modified Gravity (let alone the Newtonian baryon-only model), Milgrom's MOND is still not rejected. In fact, both the carefully calibrated fiducial model invoking a spherical dark matter (DM) halo and MOND are equally consistent with the data at almost all spatial locations (except that probably both have respective problems at low-|z| locations), no matter which tracer population or which meaningful density profile is used. Since there is no free parameter at all in the quasi-linear MOND model we use, and the baryonic parameters are actually fine-tuned in the DM context, such an effective equivalence is surprising, and might be calling forth a transcending synthesis of the two paradigms. |
学科主题 | 天文学 ; 星系与宇宙学 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
WOS关键词 | MODIFIED NEWTONIAN DYNAMICS ; MILKY-WAY ; ROTATION CURVE ; GALACTIC DISK ; MASS MODELS ; GALAXIES ; DISTANCES ; SHAPE ; TILT |
资助项目 | Natural Science Foundation of China[NSFC 11873083] ; Natural Science Foundation of China[11473062] ; NSFC for Fostering Talented Students in Basic Sciences (through USTC)[J1310021] ; CAS for Innovation Training Programs for Undergraduates ; National Key R&D Program of China[2019YFA0405503] ; NSFC[11903027] ; NSFC[11833006] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000916820100004 |
资助机构 | Natural Science Foundation of China[NSFC 11873083, 11473062] ; NSFC for Fostering Talented Students in Basic Sciences (through USTC)[J1310021] ; CAS for Innovation Training Programs for Undergraduates ; National Key R&D Program of China[2019YFA0405503] ; NSFC[11903027, 11833006] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25840] |
专题 | 云南天文台_丽江天文观测站(南方基地) 云南天文台_抚仙湖太阳观测站 |
通讯作者 | Dong XB(董小波) |
作者单位 | 1.Linx Lab, Hisilicon, Shenzhen, Guangdong 518129, China 2.Lab of Solid-State Electronics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China; 3.School of Information Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; 4.Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, D-60438 Frankfurt am Main, Germany; 5.National Astronomical Observatories, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China; 6.University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China; 7.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, China; 8.Division of Particle and Astrophysical Science, Nagoya University, Nagoya, Aichi 464-8601, Japan; 9.Department of Physics & Astronomy, University of California, Riverside, CA 92521, USA; |
推荐引用方式 GB/T 7714 | Zhu, Yongda,Ma, Hai-Xia,Dong XB,et al. How close dark matter haloes and MOND are to each other: three-dimensional tests based on Gaia DR2(star)[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,519(3):4479-4498. |
APA | Zhu, Yongda.,Ma, Hai-Xia.,Dong XB.,Huang, Yang.,Mistele, Tobias.,...&Jin, Xi.(2023).How close dark matter haloes and MOND are to each other: three-dimensional tests based on Gaia DR2(star).MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,519(3),4479-4498. |
MLA | Zhu, Yongda,et al."How close dark matter haloes and MOND are to each other: three-dimensional tests based on Gaia DR2(star)".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 519.3(2023):4479-4498. |
入库方式: OAI收割
来源:云南天文台
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