对TrES-2三年地基和天基photometry的一致性分析
A consistent analysis of three years of ground- and space-based photometry of TrES-2
摘要：
G 0 V矮星TrES-2A被一颗热木星穿过，是开普勒望远镜的主要短节奏目标之一，因此是当今已知的光度学研究最好的行星系之一。鉴于行星轨道的几何形状接近掠射，TrES-2为探索其轨道几何形状的变化提供了一个极好的机会。我们的研究重点是在以前的研究中报道的轨道倾角的长期变化。我们提出了一个联合分析的前四个季度的开普勒测光连同公开获得的地面数据，因为在2006年发现的TrES-2b。我们使用一个共同的方法，根据最新的信息，视觉同伴的TrES-2A和恒星临边变暗，以进一步完善轨道参数。我们发现开普勒观测排除了先前声称的长期倾角变化以及凌日时间的变化，然而，它们也显示出轻微的迹象，表明倾角的进一步变化仍然是微不足道的。
英文摘要：
The G0V dwarf TrES-2A, which is transited by a hot Jupiter, is one of the main short-cadence targets of the Kepler telescope and, therefore, among the photometrically best-studied planetary systems known today. Given the near-grazing geometry of the planetary orbit, TrES-2 offers an outstanding opportunity to search for changes in its orbital geometry. Our study focuses on the secular change in orbital inclination reported in previous studies. We present a joint analysis of the first four quarters of Kepler photometry together with the publicly available ground-based data obtained since the discovery of TrES-2b in 2006. We use a common approach based on the latest information regarding the visual companion of TrES-2A and stellar limb darkening to further refine the orbital parameters. We find that the Kepler observations rule out a secular inclination change of previously claimed order as well as variations of the transit timing, however, they also show slight indication for further variability in the inclination which remains marginally significant.
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