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是一项ESA S级任务，于2019年12月启动。这是第一个致力于在已经众所周知的寄托星球已知的明亮恒星上进行超高精度的光度法，致力于寻找超高精度的光度。在Cheops上的80％（约17500个轨道）的时间分配给了保证的时间观察，其中包括约500个轨道，分配了大约30种具有非常低质量伴侣的黯然失色的二进制文件。通过传播系外行星的调查发现了带有传播M少量伴侣的太阳能型恒星。这些“ EBLM”（黯然失色的二进制，低质量）系统非常适合使用用于透视系外行星的相同技术来校准非常低的质量恒星的质量 - 拉迪斯金属关系。目前，这种关系定义很差，并且迫切需要改进它，因为很明显，低质量恒星在可居住的区域中占据了更多的岩石行星，而不是更大的恒星，并且详细研究这些行星要容易得多。

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