Analysis of CHEOPS light curves for eclipsing binaries with very low mass stars

具有极低质量恒星的食双星的 CHEOPS 光变曲线分析

• 批准号: 2312200
• 金额: --
• 依托单位: Keele University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2312200
• 关键词: Analysis; CHEOPS; light; curves; eclipsing

CHEOPS is an ESA S-class mission that was launched in December 2019. It is the first mission dedicated to searching for exoplanetary transits by performing ultrahigh precision photometry on bright stars already known to host planets. 80% of the time on CHEOPS ( ~17500 orbits) is allocated for Guaranteed Time Observations, including ~500 orbits assigned to observe about 30 eclipsing binaries with very low mass companions. Solar-type stars with transiting M-dwarf companions are found in large numbers by surveys for transiting exoplanets. These "EBLM" (eclipsing binary, low-mass) systems are ideal for calibrating the mass-radius-metallicity relation for very low mass stars using the same techniques employed for transiting exoplanets. This relation is very poorly defined currently, and it has become urgent to improve it since it has become clear that low mass stars host more rocky planets in the habitable zone than more massive stars, and it is much easier to study these planets in detail.

CHEOPS是欧空局S级使命，于2019年12月发射。这是第一个专门通过对已知有行星的明亮恒星进行高精度测光来寻找系外行星凌日的使命。CHEOPS上80%的时间（约17500个轨道）被分配用于保证时间观测，其中约500个轨道被分配用于观测约30个具有非常低质量伴星的食双星。在对凌日系外行星的调查中，大量发现了有凌日M矮星伴星的太阳型恒星。这些“EBLM”（食双星，低质量）系统是理想的校准质量-半径-金属丰度关系的非常低质量的恒星使用相同的技术用于凌日系外行星。这种关系目前定义得很差，并且迫切需要改进它，因为已经清楚的是，低质量恒星比大质量恒星在可居住区拥有更多的岩石行星，并且更容易详细地研究这些行星。

项目成果

The TESS light curve of the eccentric eclipsing binary 1SWASP J011351.29+314909.7 - no evidence for a very hot M-dwarf companion

偏心食双星 1SWASP J011351.29 314909.7 的 TESS 光变曲线 - 没有证据表明存在非常热的 M 矮星伴星

• DOI: 10.1093/mnrasl/slaa122
• 发表时间: 2020
• 期刊: Letters
• 作者: Swayne M