RUI/Collaborative Research: MOLECULAR BAND MEASUREMENTS OF ABSOLUTE STARSPOT PROPERTIES

RUI/合作研究：绝对星斑特性的分子带测量

• 批准号: 1109695
• 负责人: Laura Penny
• 金额: $ 16.61万
• 依托单位: College of Charleston
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1109695&HistoricalAwards=false
• 关键词: RUI; Collaborative; Research; MOLECULAR; BAND

Dr. James Neff (College of Charleston, South Carolina) and Dr. Douglas O'Neal (Keystone College, Pennsylvania) will lead an effort to understand the physical conditions in starspots. Analogous to spots on the Sun, starspots are regions in the atmospheres of other stars that are cooler than the rest of the stellar surface. The goals of this project are to use recent advances in atmospheric modeling codes to determine starspot properties, re-analyze extensive databases of existing spectra using the new techniques, expand observational surveys to include cooler stars, and combine various techniques to yield a better understanding of the observational signatures of starspots.Magnetic activity on the Sun is perhaps the most dramatic way in which astronomy impacts our daily lives. By measuring the properties and distribution of starspots on a wide range of active stars, it might be possible to uncover the fundamental nature of the solar dynamo. Photometric light curve modeling, Doppler imaging, and the spectroscopic properties of molecular bands (which are formed only in starspots, not in the warmer unspotted atmosphere) all yield important information about the distribution, temperature, and fractional coverage of starspots.

詹姆斯·内夫博士（查尔斯顿学院，南卡罗来纳州）和道格拉斯·奥尼尔博士（宾夕法尼亚州基斯通学院）将领导一项了解恒星黑子物理条件的工作。 与太阳上的黑子类似，星斑是其他恒星大气中比恒星表面其他部分温度更低的区域。 该项目的目标是利用大气模拟代码的最新进展来确定星点属性，使用新技术重新分析现有光谱的广泛数据库，扩大观测调查，包括较冷的恒星，并结合联合收割机各种技术，以更好地了解星点的观测特征。通过测量大范围活跃恒星上星点的性质和分布，有可能揭示太阳发电机的基本性质。光度学的光变曲线模型、多普勒成像和分子波段的光谱特性（这些光谱特性只在恒星黑子中形成，而不是在温暖的无黑子大气中形成）都能提供有关恒星黑子分布、温度和覆盖率的重要信息。