The Splash without a Merger
文献类型：期刊论文
| 作者 | Amarante, Joao A. S.2; Beraldo e Silva, Leandro1; Debattista, Victor P.1; Smith, Martin C.2 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2020-03-10 |
| 卷号 | 891期号:2页码:7 |
| 关键词 | Milky Way dynamics Milky Way formation Hydrodynamical simulations Milky Way evolution |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ab78a4 |
| 英文摘要 | The 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. |
| WOS关键词 | STELLAR HALO ; MILKY-WAY ; GAIA ; DISKS ; AGES ; I. |
| 资助项目 | National 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] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000519102400001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | 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 ; 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 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/54555]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Amarante, Joao A. S. |
| 作者单位 | 1.Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England 2.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：国家天文台
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