NAOC Open IR
Further evidence for a population of dark-matter-deficient dwarf galaxies
Guo, Qi1,2,3; Hu, Huijie1,2; Zheng, Zheng1,4; Liao, Shihong1,3; Du, Wei1,5; Mao, Shude1,6,7; Jiang, Linhua8; Wang, Jing8; Peng, Yingjie8; Gao, Liang1,2,3; Wang, Jie1,2,3; Wu, Hong1,2,5
2020-03-01
Source PublicationNATURE ASTRONOMY
ISSN2397-3366
Volume4Issue:3Pages:246-+
AbstractIn 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.
Funding OrganizationNational 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
DOI10.1038/s41550-019-0930-9
WOS KeywordDIGITAL SKY SURVEY ; FAST ALPHA SURVEY ; MASS ; CLUSTER ; SATELLITES ; LUMINOSITY
Language英语
Funding ProjectNational 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
Funding OrganizationNational 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
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000519439900018
PublisherNATURE PUBLISHING GROUP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/56364
Collection中国科学院国家天文台
Corresponding AuthorGuo, Qi
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Key Lab Five Hundred Meter Aperture Spher Radio T, Beijing, Peoples R China
5.Natl Astron Observ, Key Lab Opt Astron, Beijing, Peoples R China
6.Tsinghua Univ, Phys Dept, Beijing, Peoples R China
7.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing, Peoples R China
8.Peking Univ, Kavli Inst Astron & Astrophys, Beijing, Peoples R China
Recommended Citation
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-+.
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