Detecting Companions of the Most Massive Stars

探测最大质量恒星的伴星

• 批准号: 0307778
• 负责人: Henry Kobulnicky
• 金额: --
• 依托单位: University of Wyoming
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307778&HistoricalAwards=false
• 关键词: Detecting; Companions; Most; Massive; Stars

AST 0307778PI KobulnickyThere is a long-standing discrepancy regarding the mass distribution of close companions around massive stars. Knowing the companions' masses and orbital characteristics is crucial for understanding massive star formation, evolution, and the progenitor populations of X-ray binaries and gamma-ray bursts. To resolve this discrepancy, the principle investigator will lead a team of graduate students, undergraduate students, school teachers and their students on a 3-year program, ideally suited to the capabilities of Wyoming's 2.3 m telescope, to measure the frequencies, mass ratios and orbital separations of a complete sample of massive stars in the young and populous Cygnus OB2 association. The team will increase the field of view on Wyoming's telescope and perform an optical photometric variability search for eclipsing binaries among the hundreds of massive stars in the association, and continue a radial velocity survey of a complete sample of about 140 massive stars in Cygnus OB2, extending the time base, and beginning to measure their periods and mass ratios. The multi-epoch spectra will be published as an online database available to the community.Broader Impact. This program will answer fundamental astrophysical questions while involving students and teachers from largely-rural communities and native-American schools in all aspects of astronomy research from optics and data analysis to the presentation of results. This is part of a long-term effort to modernize the basic science & technology infrastructure at the University of Wyoming Physics & Astronomy Department. The Wyoming Space Camp, a modular, long-term education/research enterprise where Wyoming's science teachers, classes, and college students participate in real science will also be initiated. The Space Camp program promotes the National Academy of Sciences standards and the Wyoming Grade 8 Science Content and Performance Standards

AST 0307778PI KOBULNICKYTHERE是关于大型恒星周围亲密伴侣的质量分布的长期差异。了解同伴的质量和轨道特征对于理解X射线二进制和伽马射线爆发的巨大恒星形成，进化和祖先种群至关重要。为了解决这一差异，主要研究者将领导一组研究生，本科生，学校老师及其学生进行3年计划，非常适合怀俄明州的2.3 m望远镜的能力，以衡量年轻和流行的Cygnus Cygnus ob2 Invimession of Poper Sarts的频率，质量比率和Orbital分离。该团队将增加对怀俄明州望远镜的视野，并在协会中数百个巨大的恒星中进行光学变异性搜索，并继续对CygnusOB2中约140个大型恒星的完整样本进行径向速度调查，并开始延长时间群，并开始衡量其周期和质量比率。多个上述光谱将作为社区可用的在线数据库发布。该计划将回答基本的天体物理问题，同时涉及从光学和数据分析到结果的呈现的天文学研究的各个方面的学生和教师。这是怀俄明大学物理与天文学系的基础科学技术基础设施现代化的长期努力的一部分。 怀俄明州太空营是一个模块化的长期教育/研究企业，怀俄明州的科学教师，班级和大学生也将启动真正的科学。太空营计划促进了国家科学学院标准和怀俄明州8级科学内容和绩效标准