TrES系外行星和假阳性：在干草堆中找到针
TrES Exoplanets and False Positives: Finding the Needle in the Haystack
摘要：
我们对气态巨行星的形成及其质量-半径关系的不完全理解激发了对新的太阳系外巨行星的地面宽视场调查。然而，天体物理学的误报主导了这些活动的收益。在一些天文系统中，来自一个微弱的食双星和一颗明亮的恒星的光混合在一起，产生了类似凌日的光变曲线，这是特别难以消除的。作为跨大西洋系外行星调查的一部分，我们遇到了许多误报，并制定了一个程序来拒绝它们。我们提出了这些假阳性的例子，包括混合系统GSC 03885-00829，我们发现它是一个K矮星双星系统叠加在一个晚F矮星。这个过境候选人特别展示了在过境调查中识别天体物理假阳性所需的仔细分析。从这些冒名顶替者中，我们发现了两颗凌日行星。我们讨论我们的后续观测的TrES-2，在开普勒领域的第一个过境行星。
英文摘要：
Our incomplete understanding of the formation of gas giants and of their mass-radius relationship has motivated ground-based, wide-field surveys for new transiting extrasolar giant planets. Yet, astrophysical false positives have dominated the yield from these campaigns. Astronomical systems where the light from a faint eclipsing binary and a bright star is blended, producing a transit-like light curve, are particularly difficult to eliminate. As part of the Trans-atlantic Exoplanet Survey, we have encountered numerous false positives and have developed a procedure to reject them. We present examples of these false positives, including the blended system GSC 03885-00829 which we showed to be a K dwarf binary system superimposed on a late F dwarf star. This transit candidate in particular demonstrates the careful analysis required to identify astrophysical false positives in a transit survey. From amongst these impostors, we have found two transiting planets. We discuss our follow-up observations of TrES-2, the first transiting planet in the Kepler field.
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