RUI/Collaborative Research: A Spectroscopic Survey of Circumstellar Gas in Lambda Boo Stars

RUI/合作研究：对 Lambda Boo 星中的星周气体进行光谱测量

• 批准号: 1211221
• 负责人: Laura Penny
• 金额: $ 7.93万
• 依托单位: College of Charleston
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1211221&HistoricalAwards=false
• 关键词: RUI; Collaborative; Research; Spectroscopic; Survey

This is part of a collaborative project with three universities to conduct a detailed study of circumstellar gas around rapidly rotating A-type dwarf stars. An A-type main-sequence star is burning hydrogen and ais distinguished by having spectra showing strong hydrogen absoprtion lines. Some of these A type stars also have low metal abundances in their surface layers and are sometimes referred to as "Lambda Boo" stars, after lambda Bootis, the first one to show these features. This project will focus on observing the gas emission in order to constrain models of accretion from disk to the star and to better understand planetary formation and evolution models. This project will have broader impacts of contributing to knowledge of stellar and planetary system evolution. These institutions will also add a significant undergraduate educational component, involving students in the data acquisition, reduction, analysis, and publication of results.

这是与三所大学合作项目的一部分，目的是对快速旋转的a型矮星周围的恒星周围气体进行详细研究。a型主序星燃烧氢，其光谱显示出强烈的氢吸收线。其中一些A型恒星的表层金属丰度也很低，有时被称为“Lambda Boo”恒星，在Lambda Bootis之后，它是第一个显示这些特征的恒星。该项目将专注于观测气体排放，以约束从圆盘到恒星的吸积模型，并更好地理解行星的形成和演化模型。这个项目将对恒星和行星系统演化的知识产生更广泛的影响。这些机构还将增加一个重要的本科教育组成部分，让学生参与数据采集、减少、分析和公布结果。