Journey to the Centre of Stars: Testing Stellar Evolution with Asteroseismology

恒星中心之旅：用星震学测试恒星演化

• 批准号: 1105930
• 负责人: Sarbani Basu
• 金额: $ 34.55万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1105930&HistoricalAwards=false
• 关键词: Journey; Centre; Stars; Testing; Stellar

This work will use asteroseismic data of stellar pulsations to test models of stellar evolution. As part of this effort, Dr. Basu and a postdoctoral associate will test whether the internal structure and underlying physics of the most stellar evolution theory is correct. Dr. Basu will also use asteroseismology data to obtain masses, radii, effective temperatures, helium abundances, log g(surface gravity) and convection zone sizes in stars. In particular, her team will use data on the large separation and frequency of maximum oscillation for numerous stars provided by the Kepler Asteroseismic Science Consortium to determine how gross properties of the models should vary across the HR diagram. This work will extend well beyond stellar astrophysics because stars are used to calibrate both time and distance scales in the Universe and if the stellar models are incorrect, this would have many cosmological implications. This will also involve the training of a postdoctoral research associate.

这项工作将使用恒星脉动的星震数据来测试恒星演化模型。作为这项工作的一部分，巴苏博士和一名博士后将测试大多数恒星演化理论的内部结构和基本物理原理是否正确。巴苏博士还将使用星震学数据来获得恒星的质量、半径、有效温度、氦丰度、logg（表面重力）和对流区大小。特别是，她的团队将使用开普勒星震科学联盟提供的大量恒星的大间隔和最大振荡频率的数据来确定模型的总体特性在HR图上应该如何变化。这项工作将远远超出恒星天体物理学，因为恒星被用来校准宇宙中的时间和距离尺度，如果恒星模型不正确，这将产生许多宇宙学意义。这还包括培养一名博士后研究助理。