Old Stellar Populations in Galaxies

星系中的古老恒星种群

• 批准号: 8919455
• 负责人: James Rose
• 金额: $ 9.7万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-01 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8919455&HistoricalAwards=false
• 关键词: Old; Stellar; Populations; Galaxies

This investigation will study the formation and early evolution of galaxies with particular attention paid to how these processes are affected by the environment. This will be done by observing old stellar populations in early type galaxies and in our own galaxy. Recent work by this investigator has suggested that star formation is truncated in early type galaxies in dense cluster cores. This work will be greatly extended to confirm or modify this result. In addition, his recent discovery that nearly half of the early type galaxies in the nearby, dynamically young Pega- sus I cluster show clear signs of recent star formation will be followed up to determine if this result can be related to other workers observations of a similar effect much more distant galaxy clusters. Finally, the results of these observations will be applied to the case of our own galaxy, in trying to understand its collapse and early chemical evolution.

这项调查将研究星系的形成和早期演变，并特别注意这些过程如何受环境影响。 这将通过观察早期类型星系和我们自己的星系中的旧恒星种群来完成。 该研究者最近的工作表明，在致密群岩的早期类型星系中，恒星形成被截断。 这项工作将大大扩展以确认或修改此结果。 此外，他最近发现的是，在附近的早期类型的星系中，动态年轻的佩格斯一世集群显示出明显的近期星形形成的明显迹象，以确定该结果是否可以与其他工人观察到的类似效果的其他观察到更遥远的星系群。 最后，这些观察结果将应用于我们自己的星系的情况，试图了解其崩溃和早期化学演化。