Study of Roles of Magnetic Fields in Pulsations of roAp Stars

磁场对roAp星脉动作用的研究

• 批准号: 9414037
• 负责人: Elizabeth Zita
• 金额: $ 1.8万
• 依托单位: Grinnell College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-06-15 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9414037&HistoricalAwards=false
• 关键词: Study; Roles; Magnetic; Fields; Pulsations

9414037 Zita The rapidly oscillating peculiar A stars, known as roAp stars, exhibit small amplitude brightness variations with periods of minutes or tens of minutes. While this behavior is similar to the p-mode oscillations observed in the sun, a different excitation mechanism must be involved. The PI suggests that magnetic fluctuations are a strong possibility. She has shown that the conditions in the envelopes of the roAp stars are suitable for this mechanism. With the support of this Research Planning Grant she will establish the initial and boundary conditions needed to model the dynamics of the roAp star envelopes and produce some test models. ***

小行星9414037 快速振荡的特殊A星，被称为roAp星，表现出小幅度的亮度变化，周期为几分钟或几十分钟。 虽然这种行为类似于在太阳中观察到的p模式振荡，但必须涉及不同的激发机制。 PI表明，磁场波动是一个很大的可能性。 她已经证明了roAp星的包层中的条件适合于这种机制。 在这项研究计划资助的支持下，她将建立对roAp星星包层的动力学建模所需的初始和边界条件，并制作一些测试模型。 ***