Planets around evolved binary stars

演化双星周围的行星

基本信息

批准号：
1739160
负责人：
Smadar Naoz
金额：
$ 40.05万
依托单位：
University of California-Los Angeles
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-03-01 至 2022-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1739160&HistoricalAwards=false
关键词：
Planets around evolved binary stars

项目摘要

Exoplanets are found around many different types and ages of stars. Many planets circle closer to their host stars than the distance from our Sun to its closest planet, Mercury. Older stars, however, can have many planets but very few planets located close to the star itself. This research addresses the question of how planets in systems having two stars that orbit each other, or binary stars, survive. The Principal Investigator will organize a program for pre-college students with an interest in astronomy who are diagnosed with dyslexia, ADHD, and/or autism spectrum disorder. The goal of the program is to encourage these high schoolers to pursue higher education and to help them overcome obstacles that they could encounter on their way. This research will utilize the hierarchical secular three body approximation and will include relevant physical processes, such as general relativity, tides and stellar evolution. The investigators will link their work to astronomical observations by providing specific predictions that are testable when compared to current and future observations. This research expands our knowledge of interactions taking place beyond the limits of our solar system, the regime from which astrodynamics theory originated. Since every star will undergo various post main sequence evolutionary stages this study will provide a detailed analysis of the fate of planetary systems in evolved stellar binaries.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在许多不同类型和年龄的恒星周围发现了系外行星。许多行星与其主恒星的距离比太阳与其最近的行星水星的距离更近。然而，较老的恒星可能有许多行星，但靠近恒星本身的行星很少。这项研究解决了具有两颗相互绕转的恒星或双星的系统中的行星如何生存的问题。首席研究员将为对天文学感兴趣、被诊断患有阅读障碍、多动症和/或自闭症谱系障碍的大学预科学生组织一个项目。该计划的目标是鼓励这些高中生接受高等教育，并帮助他们克服路上可能遇到的障碍。这项研究将利用分层世俗三体近似，并将包括相关的物理过程，例如广义相对论、潮汐和恒星演化。研究人员将通过提供与当前和未来的观测结果相比可测试的具体预测，将他们的工作与天文观测联系起来。这项研究扩展了我们对太阳系之外发生的相互作用的认识，而太阳系是天体动力学理论的起源。由于每颗恒星都会经历不同的主序后演化阶段，这项研究将对演化的恒星双星中行星系统的命运进行详细分析。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和技术进行评估，被认为值得支持。更广泛的影响审查标准。