论文标题
过境行星系统WASP-86/KELT-12：TESS提供铸造票
The transiting planetary system WASP-86/KELT-12: TESS provides the casting vote
论文作者
论文摘要
由两组（Faedi etal。2016）和Kelt-12（Stevens等人，2017年）独立发现了一个过境行星系统。在这些作品中确定的系统的性质非常不同，最明显的是，在行星的测得的半径中，变化为三倍。我们建议该系统被命名为WASP-86/KELT-12，以更好地分配两组之间的发现的信用。我们根据均匀的研究方法，通过过渡系外星卫星的光曲线分析了该系统的光曲线，该卫星在两个部门中观察到了它。我们发现先前两项研究之间的特性中间：恒星的质量为1.278 +/- 0.039 MSUN，半径为2.02 +/- 0.12 RSUN，并且行星的质量为0.833 +/- 0.049 MJUP，半径为1.382 +/- 0.089 RJUP。该系统的前两组测量特性的差异是由于在过境深度和持续时间上的分歧，这是由于过境长而浅而引起的，因此不太适合从地面望远镜的后续光度法。我们还更新了轨道滨海，以帮助该系统上的未来工作，这是通过传输光谱范围来表征行星气氛的好候选者。
A transiting planetary system was discovered independently by two groups, under the names WASP-86 (Faedi et al. 2016) and KELT-12 (Stevens et al. 2017). The properties of the system determined in these works were very different, most tellingly a variation of a factor of three in the measured radius of the planet. We suggest that the system be named WASP-86/KELT-12 to better apportion the credit for discovery between the two groups. We analyse the light curve of this system from the Transiting Exoplanet Survey Satellite, which observed it in two sectors, following the Homogeneous Studies approach. We find properties intermediate between the two previous studies: the star has a mass of 1.278 +/- 0.039 Msun and a radius of 2.02 +/- 0.12 Rsun, and the planet has a mass of 0.833 +/- 0.049 Mjup and a radius of 1.382 +/- 0.089 Rjup. The discrepancy in the two previous sets of measured properties of the system arises from a disagreement over the transit depth and duration, caused by the transit being long and shallow so not well suited to follow-up photometry from ground-based telescopes. We also update the orbital ephemeris to aid future work on this system, which is a good candidate for characterising the atmosphere of a planet through transmission spectroscopy.
