论文标题
TOI-1338：苔丝第一个过境环形星球
TOI-1338: TESS' First Transiting Circumbinary Planet
论文作者
论文摘要
我们报告了苔丝发现的第一个环形行星的检测。在30分钟的节奏和两分钟的节奏时，在1至12的扇区中观察到该目标，即已知的黯然失色的二进制。它由两颗恒星组成，质量为1.1 msun和0.3 msun，在稍微偏心（0.16），14.6天轨道上，产生突出的原发性日食和浅的次要日食。行星的半径为〜6.9后期，观察到在大致相等的深度（〜0.2％）但持续时间不同的主要恒星中进行了三个过渡，但持续时间不同，这是过境环形行星的常见签名。它的轨道几乎是圆形（E〜0.09），轨道周期为95.2天。二元和行星的轨道平面对齐到约1度以内。为了获得系统的完整解决方案，我们将苔丝光度法与现有的基于地面的径向速度观测值结合在一起，以数值光度模型模型。该系统展示了苔丝对环形行星的发现潜力，并进一步了解了绕着近二进制恒星的行星的形成和演变。
We report the detection of the first circumbinary planet found by TESS. The target, a known eclipsing binary, was observed in sectors 1 through 12 at 30-minute cadence and in sectors 4 through 12 at two-minute cadence. It consists of two stars with masses of 1.1 MSun and 0.3 MSun on a slightly eccentric (0.16), 14.6-day orbit, producing prominent primary eclipses and shallow secondary eclipses. The planet has a radius of ~6.9 REarth and was observed to make three transits across the primary star of roughly equal depths (~0.2%) but different durations -- a common signature of transiting circumbinary planets. Its orbit is nearly circular (e ~ 0.09) with an orbital period of 95.2 days. The orbital planes of the binary and the planet are aligned to within ~1 degree. To obtain a complete solution for the system, we combined the TESS photometry with existing ground-based radial-velocity observations in a numerical photometric-dynamical model. The system demonstrates the discovery potential of TESS for circumbinary planets, and provides further understanding of the formation and evolution of planets orbiting close binary stars.
