论文标题
TIC 278825952：一个三重截度的层次三重系统，具有最本质的外轨道
TIC 278825952: a triply eclipsing hierarchical triple system with the most intrinsically circular outer orbit
论文作者
论文摘要
我们报告发现在苔丝太空望远镜的南部连续观看区域中发现了紧凑的三星级系统。 TIC 278825952是一个以前未研究的，圆形的二进制二进制，其周期为4.781天，三级成分在较宽的235.55天较宽的圆形轨道中，从三组第三体eclips和光线旅行时间效应效果偏向于Eclipse Eclipse Atiging差异。我们对Eclipse的时间变化曲线，光度数据和光谱能分布进行了联合光学分析，并与使用Parsec Stellar等线连接在一起。我们发现内部二进制由略微演变组成，靠近1.12和1.09 $ m_ \ odot $的质量的双星，1.40和1.31 $ r_ \ odot $。第三个，较小的恒星的质量为0.75 $ m_ \ odot $，半径为0.70 $ r_ \ odot $。轨道的低相互倾向和偏心率表明该系统是高度共面并且令人惊讶的圆形。
We report the discovery of a compact triply eclipsing triple star system in the southern continuous viewing zone of the TESS space telescope. TIC 278825952 is a previously unstudied, circular eclipsing binary with a period of 4.781 days with a tertiary component in a wider, circular orbit of 235.55 days period that was found from three sets of third-body eclipses and from light travel-time effect dominated eclipse timing variations. We performed a joint photodynamical analysis of the eclipse timing variation curves, photometric data, and the spectral energy distribution, coupled with the use of PARSEC stellar isochrones. We find that the inner binary consists of slightly evolved, near twin stars of masses of 1.12 and 1.09 $M_\odot$ and radii of 1.40 and 1.31 $R_\odot$. The third, less massive star has a mass of 0.75 $M_\odot$ and radius of 0.70 $R_\odot$. The low mutual inclination and eccentricities of the orbits show that the system is highly coplanar and surprisingly circular.
