Tracing the accretion history of the Milky Way with chemical tagging

用化学标记追踪银河系的吸积历史

• 批准号: DP180101791
• 负责人: A/Prof Sarah Martell
• 金额: $ 25.8万
• 依托单位: The University of New South Wales
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2018
• 资助国家: 澳大利亚
• 起止时间: 2018-01-01 至 2022-11-18
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP180101791
• 关键词: Tracing; accretion; history; Milky; Way

This project aims to investigate how important the capture of satellite galaxies is for the growth of large galaxies like the Milky Way. This project’s method will identify stars from other galaxies long after they have been captured by the Milky Way, using only chemical compositions to identify stars with extragalactic origins, in contrast to previous methods, which only work for a relatively short time after a smaller galaxy’s capture. The accreted stars identified this way will give a more complete picture of how the Milky Way has grown over time, and their properties and orbits in the Milky Way will illuminate the characteristics of the galaxies from which they were captured.

该项目旨在调查卫星星系的捕获对于像银河系这样的大型星系的成长有多重要。该项目的方法将在被银河系捕获很久之后识别来自其他星系的恒星，只使用化学成分来识别起源于河外的恒星，而以前的方法只在较小的星系被捕获后相对较短的时间内有效。通过这种方式确定的吸积恒星将给出银河系如何随着时间的推移而成长的更完整的图景，它们在银河系中的性质和轨道将照亮它们被捕获的星系的特征。