CCD Photometry of RR Lyrae Stars

天琴座 RR 星的 CCD 光度测量

• 批准号: 9528080
• 负责人: Horace Smith
• 金额: $ 9.24万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-07-01 至 2000-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528080&HistoricalAwards=false
• 关键词: CCD; Photometry; RR; Lyrae; Stars

Smith 95-28080 Dr. Smith will complete the survey of variable stars in the Draco dwarf spheroidal galaxy which was initiated by Baade and Swope almost 40 years ago. New CCD observations will provide accurate multicolor lightcurves which will place the variables in the HR diagram and, together with follow-up spectroscopic observations, test the existence of a metallicity-luminosity relation in that system. Intensive series of photometric observations of multiperiodic RR Lyrae stars will provide the observational base needed to test theories of that poorly understood phenomenon. RR Lyrae variables in M14, M15 and M53 also will be studied. ***

史密斯95-28080 史密斯博士将完成由巴德和斯沃普近40年前发起的天龙座矮球状星系中变星的调查。 新的CCD观测将提供精确的X光光度曲线，将变量置于HR图中，并与后续的光谱观测一起测试该系统中金属性-光度关系的存在。 对多周期天琴座RR型恒星进行一系列密集的光度观测，将为检验这种知之甚少的现象的理论提供所需的观测基础。 还将研究M14、M15和M53中的RR型天琴座变星。 ***