A Study of Evolved Stars with Time-Series Photometry

用时间序列光度测量研究演化恒星

• 批准号: 9013368
• 负责人: Albert Grauer
• 金额: --
• 依托单位: University of Arkansas Little Rock
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-03-01 至 1995-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9013368&HistoricalAwards=false
• 关键词: Study; Evolved; Stars; Time; Series

This Research for Undergraduate Eduation award will permit the Principal Investigator (PI) to continue studies of the pulsations of stars in their terminal stages of evolution, white dwarfs and pre-white dwarfs. Using portable instrumentation constructed from a previous NSF award, the PI will spend 75 nights per year with one of two undergraduate students monitoring the light variations of candidate white dwarf pulsators. Many of the current sample of pulsating white dwarfs were discovered by this PI. The PI will continue these searches, and will also search for pulsating stars that have previously ejected most of their masses to become white dwarfs (planetary nebulae) and will also compare the pulsation periods of a selected star to determine whether the star's ageing can be followed in "real time" from its shortening pulsation periods.

这项本科教育研究奖将允许首席研究员（PI）继续研究恒星在其演化的最后阶段，白矮星和前白矮星的脉动。使用由以前的NSF奖建造的便携式仪器，PI将与两名本科生中的一名每年花75个晚上监测候选白矮星脉动的光变化。目前许多脉动白矮星的样本都是由这个PI发现的。PI将继续进行这些搜索，同时也将搜索那些先前将其大部分质量喷射成白矮星（行星状星云）的脉动恒星，并将比较选定恒星的脉动周期，以确定是否可以从其缩短的脉动周期中“实时”跟踪恒星的老化。