Using White Dwarf-M Dwarf Pairs to Probe the Magnetic Activity and Angular Momentum Evolution of Low-Mass Stars

利用白矮星-M矮星对探测低质量恒星的磁活动和角动量演化

• 批准号: 1109273
• 负责人: Andrew West
• 金额: $ 42.97万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1109273&HistoricalAwards=false
• 关键词: Using; White; Dwarf; Pairs; Probe

This award will support an observational study of widely separated binary stars consisting of a white dwarf and a cool unevolved (type M) dwarf. It has been known for decades that M stars show many signs of magnetic activity, such as chromospheric emission lines, and that the activity declines as the stars age. This study will use the white dwarfs to determine the age of each binary system, and study binaries over a wide age range to explore the age/activity relation.The work is also expected to address issues of habitability on exoplanets around M dwarfs and to provide new information on the evolution of stellar populations in our Milky Way galaxy.

该奖项将支持对由一颗白矮星和一颗未进化的冷（M型）矮星组成的广泛分离的双星的观测研究。几十年来，人们已经知道M星表现出许多磁活动的迹象，比如色球发射线，而且随着恒星年龄的增长，磁活动会减弱。本研究将使用白矮星来确定每个双星系统的年龄，并研究大年龄范围内的双星，以探索年龄/活动关系。这项工作还有望解决围绕M矮星的系外行星的可居住性问题，并提供有关银河系恒星种群演化的新信息。