用EVEREST杀死行星候选人
Killing Planet Candidates with EVEREST
摘要：
我们利用EVEREST管道的高质量测光来评估K2任务中的假阳性系外行星候选者。我们比较了EVEREST的像素级去相关方案的实际能力，这些行星候选人发现时广泛使用的数据分析管道。除去恒星的变化从珠穆朗玛峰校正的光变曲线，我们寻找潜在的二次日食。对于每个呈现二次日食的物体，我们将候选行星的隐含亮度温度与计算出的平衡温度进行比较。因此，我们可以识别出亮度温度太高而与行星不一致的物体。我们在初步审查管道中确定了七个先前标记为行星候选者的系统，并使用EVEREST将其中六个系统确定为食双星。我们还项目的重要性，TESS数据的最佳光度审查。我们发现，大多数的混合食双星可以使用TESS测光识别，这种系统的研究，原则上也可以产生有价值的信息的质量比分布在恒星食双星。
英文摘要：
We exploit high quality photometry from the EVEREST pipeline to evaluate false-positive exoplanet candidates from the K2 mission. We compare the practical capabilities of EVEREST's pixel-level decorrelation scheme to the data analysis pipelines widely used at the time of these planet candidates' discovery. Removing stellar variability from the EVEREST-corrected light curves, we search for potential secondary eclipses. For each object exhibiting a secondary eclipse, we compare the implied brightness temperature of the planet candidate to its calculated equilibrium temperature. We thereby identify objects whose brightness temperature is too high to be consistent with a planet. We identify seven systems previously flagged as planetary candidates in preliminary vetting pipelines, and use EVEREST to instead identify six of them as eclipsing binaries. We also project the importance of optimal photometric vetting for TESS data. We find that the majority of blended eclipsing binaries could be identified using TESS photometry, and a systematic study of that kind could in principle also yield valuable information on the mass ratio distribution in stellar eclipsing binaries.
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