标题： 利用英国皇家天文台望远镜对七颗热木星的二次凌星观测 显示英文标题

标题： Secondary eclipse observations for seven hot-Jupiters from the Anglo-Australian Telescope

摘要： 我们利用英澳望远镜（AAT）上的IRIS2近红外相机，报告了七颗热木星在Ks波段的次食探测和限制。首次测量了WASP-18b和WASP-36b在Ks波段的次食。我们还给出了WASP-4b、WASP-5b和WASP-46b次食的新测量值，以及WASP-2b和WASP-76b次食深度的上限。特别是，观测到了WASP-46b的两次完整次食，这使我们能够通过每次次食的独立分析来证明观测结果的可重复性。 现在已经在Ks波段和四个Spitzer IRAC通带中测量了大量的热木星次食深度。我们在这些热木星大气分布的宽带颜色和亮度温度背景下讨论了这些测量结果。具体而言，我们重新审视了最受辐射和适度受辐射行星之间的温度二分法假设。我们发现在所有这些通带中的亮度温度-平衡温度分布中没有发现多个聚类的证据，这表明这些行星的热再辐射和循环特性具有连续分布的特点。 显示英文摘要

摘要： We report detections and constraints for the near infrared Ks band secondary eclipses of seven hot-Jupiters using the IRIS2 infrared camera on the Anglo-Australian Telescope. Eclipses in the Ks band for WASP-18b and WASP-36b have been measured for the first time. We also present new measurements for the eclipses of WASP-4b, WASP-5b, and WASP-46b, as well as upper limits for the eclipse depths of WASP-2b and WASP-76b. In particular, two full eclipses of WASP-46b were observed, allowing us to demonstrate the repeatability of our observations via independent analyses on each eclipse. Significant numbers of eclipse depths for hot-Jupiters have now been measured in both Ks and the four Spitzer IRAC bandpasses. We discuss these measurements in the context of the broadband colours and brightness temperatures of the hot-Jupiter atmosphere distribution. Specifically, we re-examine the proposed temperature dichotomy between the most irradiated, and mildly irradiated planets. We find no evidence for multiple clusters in the brightness temperature - equilibrium temperature distributions in any of these bandpasses, suggesting a continuous distribution of heat re-emission and circulation characteristics for these planets.