标题： 推断系外行星大气的热再循环和反照率：比较光学相位曲线和二次凌星数据 显示英文标题

标题： Inferring heat recirculation and albedo for exoplanetary atmospheres: Comparing optical phase curves and secondary eclipse data

摘要： 利用次食观测和热相位曲线，已经推断出一些行星的基本大气特性，如反照率以及昼夜之间的热再分布。 光学相位曲线尚未被一致用于限制这些大气特性。 我们重新建模了之前发表的CoRoT-1b、TrES-2b和HAT-P-7b的相位曲线，并推导出反照率和再循环效率。 然后将这些结果与基于次食数据的先前估计进行比较。 我们使用一个物理上一致的模型来构建光学相位曲线。 该模型考虑了兰伯特反射、热发射、椭球变率和多普勒增强效应。 CoRoT-1b显示出非可忽略的散射反照率（在95%置信水平下，0.11<AS<0.3），并且昼夜温差较小，表明昼侧和夜侧之间的能量再分布适度至较高。 这些值与之前的次食和相位曲线分析结果相反。 对于HAT-P-7b，模型结果表明相对较高的散射反照率（AS=0.3）。 这证实了之前的相位曲线分析，但与从次食数据推断出的值略有矛盾。 对于TrES-2b，两种方法得出的反照率和热量再循环估计非常相似。 从次食和光学相位曲线分析推断出的再循环和反照率值之间的差异可能暗示光学和红外观测探测到不同的大气层，因此温度也不同。 显示英文摘要

摘要： Basic atmospheric properties such as albedo and heat redistribution between day and nightside have been inferred for a number of planets using observations of secondary eclipses and thermal phase curves. Optical phase curves have not yet been used to constrain these atmospheric properties consistently. We re-model previously published phase curves of CoRoT-1b, TrES-2b and HAT-P-7b and infer albedos and recirculation efficiencies. These are then compared to previous estimates based on secondary eclipse data. We use a physically consistent model to construct optical phase curves. This model takes Lambertian reflection, thermal emission, ellipsoidal variations and Doppler boosting into account. CoRoT-1b shows a non-negligible scattering albedo (0.11<AS<0.3 at 95% confidence) as well as small day-night temperature contrasts, indicative of moderate to high re-distribution of energy between dayside and nightside. These values are contrary to previous secondary eclipse and phase curve analyses. In the case of HAT-P-7b, model results suggest relatively high scattering albedo (AS=0.3). This confirms previous phase curve analysis, however, it is in slight contradiction to values inferred from secondary eclipse data. For TrES-2b, both approaches yield very similar estimates of albedo and heat recirculation. Discrepancies between recirculation and albedo values as inferred from secondary eclipse and optical phase curve analyses might be interpreted as a hint that optical and IR observations probe different atmospheric layers, and hence temperatures.