中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 国家天文台
  3. 中国科学院国家天文台
Further evidence for a population of dark-matter-deficient dwarf galaxies

文献类型：期刊论文

作者Guo, Qi2,3,4; Hu, Huijie2,3; Zheng, Zheng2,5; Liao, Shihong2,4; Du, Wei2,6; Mao, Shude2,7,8; Jiang, Linhua1; Wang, Jing1; Peng, Yingjie1; Gao, Liang2,3,4
刊名NATURE ASTRONOMY
出版日期2020-03-01
卷号4期号:3页码:246-+
ISSN号2397-3366
DOI10.1038/s41550-019-0930-9
英文摘要In the standard cosmological model, dark matter drives the structure formation of galaxies and constructs potential wells within which galaxies may form. The baryon fraction in dark halos can reach the Universal value (15.7%) in massive clusters and decreases rapidly as the mass of the system decreases(1,2). The formation of dwarf galaxies is sensitive both to baryonic processes and the properties of dark matter owing to the shallow potential wells in which they form. In dwarf galaxies in the Local Group, dark matter dominates the mass content even within their optical-light half-radii (r(e) approximate to 1 kpc)(3,4). However, recently it has been argued that not all dwarf galaxies are dominated by dark matter(5-7). Here we report 19 dwarf galaxies that could consist mainly of baryons up to radii well beyond r(e), at which point they are expected to be dominated by dark matter. Of these, 14 are isolated dwarf galaxies, free from the influence of nearby bright galaxies and high-density environments. This result provides observational evidence that could challenge the formation theory of low-mass galaxies within the framework of standard cosmology. Further observations, in particular deep imaging and spatially resolved kinematics, are needed to constrain the baryon fraction better in such galaxies.
WOS关键词DIGITAL SKY SURVEY ; FAST ALPHA SURVEY ; MASS ; CLUSTER ; SATELLITES ; LUMINOSITY
资助项目National Key R&D Program of China[2018YFA0404503] ; National Key R&D Program of China[2016YFA0400703] ; National Key R&D Program of China[2016YFA0400702] ; National Natural Science Foundation of China[11573033] ; National Natural Science Foundation of China[11622325] ; National Natural Science Foundation of China[11133003] ; National Natural Science Foundation of China[11425312] ; National Natural Science Foundation of China[11773001] ; National Natural Science Foundation of China[11721303] ; National Natural Science Foundation of China[11733006] ; National Natural Science Foundation of China[11703036] ; National Natural Science Foundation of China[U1931110] ; Royal Society Newton Advanced Fellowships ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000519439900018
出版者NATURE PUBLISHING GROUP
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Royal Society Newton Advanced Fellowships ; Royal Society Newton Advanced Fellowships ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Royal Society Newton Advanced Fellowships ; Royal Society Newton Advanced Fellowships ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Royal Society Newton Advanced Fellowships ; Royal Society Newton Advanced Fellowships ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Royal Society Newton Advanced Fellowships ; Royal Society Newton Advanced Fellowships ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, Chinese Academy of Sciences
源URL[http://ir.bao.ac.cn/handle/114a11/56363]  
专题中国科学院国家天文台
通讯作者Guo, Qi
作者单位1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, Key Lab Five Hundred Meter Aperture Spher Radio T, Beijing, Peoples R China
6.Natl Astron Observ, Key Lab Opt Astron, Beijing, Peoples R China
7.Tsinghua Univ, Phys Dept, Beijing, Peoples R China
8.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Qi,Hu, Huijie,Zheng, Zheng,et al. Further evidence for a population of dark-matter-deficient dwarf galaxies[J]. NATURE ASTRONOMY,2020,4(3):246-+.
APA Guo, Qi.,Hu, Huijie.,Zheng, Zheng.,Liao, Shihong.,Du, Wei.,...&Wu, Hong.(2020).Further evidence for a population of dark-matter-deficient dwarf galaxies.NATURE ASTRONOMY,4(3),246-+.
MLA Guo, Qi,et al."Further evidence for a population of dark-matter-deficient dwarf galaxies".NATURE ASTRONOMY 4.3(2020):246-+.

入库方式： OAI收割

来源：国家天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。