Improving the mass-radius relation of low-mass stars

改善低质量恒星的质量半径关系

• 批准号: 136972292
• 负责人: Professor Dr. Stefan Dreizler
• 金额: --
• 依托单位: Institut für Astrophysik und Geophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/136972292?language=en
• 关键词: Improving; mass; radius; relation; low

In low-mass stars, tho discrepancy between the empirical mass-radius relation from eclipsingbinaries and stellar models is an urgent problem, as it touches on our basic understanding ofstellar physics. Observing a sample of bright eclipsing binaries with low-mass companions,obtained as by-product of the TrES-survey, offers the chance to improve the observationaldatabase significantly. Wc therefore propose FOCES high resolution spectroscopy to obtainradial velocity curves in order to determine reliable masses and radii for several new low-mass stars. Special emphasis is placed on those systems with detectable spectroscopic features of the secondary.

在低质量恒星中，食双星的经验质量-半径关系与恒星模型之间的差异是一个亟待解决的问题，因为它涉及到我们对恒星物理的基本理解。观测有低质量伴星的明亮食双星样本，是tres调查的副产品，为显著改进观测数据库提供了机会。因此，WC提出用聚焦高分辨率光谱来获得径向速度曲线，以确定几颗新的低质量恒星的可靠质量和半径。特别强调的是那些具有可检测到的次级光谱特征的系统。