Magnetic Activity-Related Radial Velocity Variation and its Effects on Extra-Solar Planet Detection

磁活动相关的径向速度变化及其对太阳系外行星探测的影响

• 批准号: 9731652
• 负责人: Steven Saar
• 金额: $ 12万
• 依托单位: Smithsonian Institution Astrophysical 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: 1998-07-01 至 2001-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9731652&HistoricalAwards=false
• 关键词: Magnetic; Activity; Related; Radial; Velocity

Saar, Steven AST-9731652 Dr. Saar will investigate the effects of stellar magnetic and surface phenomena, such as magnetic activity, rotation, and starspots, on high-precision radial velocity measurements which are used for the detection of extra-solar planets. His goals are two-fold. By better understanding the cause of radial velocity variations due to intrinsic stellar properties, he plans to verify current extra-solar planet candidates and to provide guidance to current and future planet searches. His work will also lead to improved understanding of the interaction of magnetic fields with convection in stellar photospheres, and how convective properties vary with stellar parameters. Much of his work concentrates on performing an analysis of line bisectors from high resolution spectroscopic data of a sample of main-sequence dwarf stars which have long-term spectral observations and cover a range of basic stellar parameters in temperature, activity level, and rotation properties. ***

Saar，Steven AST-9731652 萨尔博士将研究恒星磁场和表面现象，如磁活动，旋转和星点，对用于探测太阳系外行星的高精度径向速度测量的影响。 他的目标是双重的。 通过更好地了解恒星固有特性导致径向速度变化的原因，他计划验证当前太阳系外行星候选者，并为当前和未来的行星搜索提供指导。 他的工作也将导致更好地理解磁场与恒星光球对流的相互作用，以及对流特性如何随恒星参数而变化。 他的大部分工作集中在对主序星样本的高分辨率光谱数据进行线平分线分析，这些主序星具有长期的光谱观测，并涵盖了温度，活动水平和旋转特性等一系列基本恒星参数。 ***