NAOC Open IR
The Splash without a Merger
Amarante, Joao A. S.1; Beraldo e Silva, Leandro2; Debattista, Victor P.2; Smith, Martin C.1
2020-03-10
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume891Issue:2Pages:7
AbstractThe Milky Way's progenitor experienced several merger events that left their imprints on the stellar halo, including the Gaia-Sausage/Enceladus. Recently, it has been proposed that this event perturbed the proto-disk and gave rise to a metal-rich ([Fe/H] > -1), low angular momentum (v < 100 km s(-1)) stellar population. These stars have dynamical and chemical properties different from the accreted stellar halo, but are continuous with the canonical thick disk. In this Letter, we use a hydrodynamical simulation of an isolated galaxy that develops clumps that produce a bimodal thin+thick disk chemistry to explore whether it forms such a population. We demonstrate that clump scattering forms a metal-rich, low angular momentum population, without the need for a major merger. We show that, in the simulation, these stars have chemistry, kinematics, and density distribution in good agreement with those in the Milky Way.
KeywordMilky Way dynamics Milky Way formation Hydrodynamical simulations Milky Way evolution
Funding OrganizationNational Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; World Academy of Sciences ; World Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant ; STFC Consolidated grant ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grant ; STFC capital grant ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; World Academy of Sciences ; World Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant ; STFC Consolidated grant ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grant ; STFC capital grant ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; World Academy of Sciences ; World Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant ; STFC Consolidated grant ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grant ; STFC capital grant ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; World Academy of Sciences ; World Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant ; STFC Consolidated grant ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grant ; STFC capital grant ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant
DOI10.3847/2041-8213/ab78a4
WOS KeywordSTELLAR HALO ; MILKY-WAY ; GAIA ; DISKS ; AGES ; I.
Language英语
Funding ProjectNational Key Basic Research and Development Program of China[2018YFA0404501] ; NSFC[11673083] ; World Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant[ST/R000786/1] ; BIS National E-infrastructure capital grant[ST/J005673/1] ; STFC capital grant[ST/H008586/1] ; STFC DiRAC Operations grant[ST/K00333X/1]
Funding OrganizationNational Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; World Academy of Sciences ; World Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant ; STFC Consolidated grant ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grant ; STFC capital grant ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; World Academy of Sciences ; World Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant ; STFC Consolidated grant ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grant ; STFC capital grant ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; World Academy of Sciences ; World Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant ; STFC Consolidated grant ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grant ; STFC capital grant ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; NSFC ; NSFC ; World Academy of Sciences ; World Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; STFC Consolidated grant ; STFC Consolidated grant ; BIS National E-infrastructure capital grant ; BIS National E-infrastructure capital grant ; STFC capital grant ; STFC capital grant ; STFC DiRAC Operations grant ; STFC DiRAC Operations grant
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000519102400001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/54556
Collection中国科学院国家天文台
Corresponding AuthorAmarante, Joao A. S.
Affiliation1.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England
Recommended Citation
GB/T 7714
Amarante, Joao A. S.,Beraldo e Silva, Leandro,Debattista, Victor P.,et al. The Splash without a Merger[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,891(2):7.
APA Amarante, Joao A. S.,Beraldo e Silva, Leandro,Debattista, Victor P.,&Smith, Martin C..(2020).The Splash without a Merger.ASTROPHYSICAL JOURNAL LETTERS,891(2),7.
MLA Amarante, Joao A. S.,et al."The Splash without a Merger".ASTROPHYSICAL JOURNAL LETTERS 891.2(2020):7.
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