期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 450, 期 3, 页码 2874-2887出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv807
关键词
surveys; stars: abundances; stars: kinematics and dynamics; Galaxy: disc; Galaxy: evolution; Galaxy: formation
资金
- project grant 'The New Milky Way' from the Knut and Alice Wallenberg Foundation
- SNF [PP00P2_128540/1]
- MINECO [ESP2013-41268-R]
- Generalitat of Catalunya [2014SGR-1458]
- European Union FP7-PEOPLE-IEF grant [328098]
- Swedish National Space Board (SNSB/Rymdstyrelsen)
- Chile's Ministry of Economy, Development, and Tourism's Millennium Science Initiative [IC120009]
- European Union FP7 programme through ERC [320360]
- Leverhulme Trust [RPG-2012-541]
- INAF
- Ministero dell' Istruzione, dell' Universita' e della Ricerca (MIUR)
According to our current cosmological model, galaxies like the Milky Way are expected to experience many mergers over their lifetimes. The most massive of the merging galaxies will be dragged towards the disc plane, depositing stars and dark matter into an accreted disc structure. In this work, we utilize the chemodynamical template developed in Ruchti et al. to hunt for accreted stars. We apply the template to a sample of 4675 stars in the third internal data release from the Gaia-ESO Spectroscopic Survey. We find a significant component of accreted halo stars, but find no evidence of an accreted disc component. This suggests that the Milky Way has had a rather quiescent merger history since its disc formed some 8-10 billion years ago and therefore possesses no significant dark matter disc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据