Stellar and Solar Magnetic Activity Cycles

恒星和太阳磁活动周期

• 批准号: 9731636
• 负责人: G. Wesley Lockwood
• 金额: $ 32.14万
• 依托单位: Lowell Observatory
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-01 至 2002-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9731636&HistoricalAwards=false
• 关键词: Stellar; Solar; Magnetic; Activity; Cycles

This continuation of the Solar-Stellar Spectrograph Program incorporates a new paradigm to the investigators' research: observing the stars as a sun, rather than the sun as a star. While chromospheric diagnostics continue to play an integral part in analysis, the investigators have realized spectral lines originating from the 'quiet' Sun and stars have potential to significantly alter the way long-term solar and stellar variability is studied. Thus, they use the full content of spectra to pursue a deeper understanding of several important issues; namely, (1) relative variability of the Sun and solar-analogous stars, (2) nature of 'Maunder Minimum' stars, (3) response of quiet and active lines to variability on different timescales, and (4) using these data as predictors of upcoming activity.

太阳-恒星摄谱仪项目的这一延续为研究人员的研究提供了一个新的范例：将恒星作为太阳来观察，而不是将太阳作为恒星来观察。虽然色球诊断在分析中继续发挥着不可或缺的作用，但研究人员已经意识到，来自“安静”太阳和恒星的光谱线有可能显著改变太阳和恒星长期变化的研究方式。因此，他们使用光谱的全部内容来追求对几个重要问题的更深层次的理解；即：(1)太阳和类似太阳的恒星的相对变异性，(2)“蒙德极小期”恒星的性质，(3)在不同时间尺度上平静线和活跃线对变异性的响应，以及(4)使用这些数据作为即将到来的活动的预测指标。