Periodic Phenomena in Cataclysmic Binaries

灾难性双星中的周期性现象

• 批准号: 1211129
• 负责人: Joseph Patterson
• 金额: $ 22.41万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-01 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1211129&HistoricalAwards=false
• 关键词: Periodic; Phenomena; Cataclysmic; Binaries

This award will support the continuation of a longstanding program to observe mass-transfer close binary stars. Long-term observations of such systems are important for determination of the orbital period and for detecting changes in the period that result from angular momentum loss. These observations can also yield basic data on the mass ratio and the mass-radius relation of the secondary stars, which are important tests of stellar evolution theory.The broader impact of the proposed activity will come from the involvement of the amateur astronomical community in the monitoring of cataclysmic variables. The program is also expected to produce valuable information on the space distribution and lifetimes of cataclysmic variables in the Milky Way, and on how close binary stars end their lives.

这一奖项将支持长期观测质量转移近双星的计划的继续。对这类系统的长期观测对于确定轨道周期和探测角动量损失引起的周期变化很重要。这些观测还可以提供关于次级恒星的质量比和质量-半径关系的基本数据，这是对恒星演化理论的重要检验。拟议活动的更广泛影响将来自业余天文团体参与监测激变变星。预计该项目还将提供有关银河系灾难性变星的空间分布和寿命，以及近距离双星如何结束生命的有价值的信息。