Harrington Joseph, Hansen Brad M, Luszcz Statia H, Seager Sara, Deming Drake, Menou Kristen, Cho James Y-K, Richardson L Jeremy
Department of Physics, University of Central Florida, Orlando, FL 32816, USA.
Science. 2006 Oct 27;314(5799):623-6. doi: 10.1126/science.1133904. Epub 2006 Oct 12.
The star upsilon Andromedae is orbited by three known planets, the innermost of which has an orbital period of 4.617 days and a mass at least 0.69 that of Jupiter. This planet is close enough to its host star that the radiation it absorbs overwhelms its internal heat losses. Here, we present the 24-micrometer light curve of this system, obtained with the Spitzer Space Telescope. It shows a variation in phase with the orbital motion of the innermost planet, demonstrating that such planets possess distinct hot substellar (day) and cold antistellar (night) faces.
仙女座υ星有三颗已知行星环绕，其中最内侧的行星轨道周期为4.617天，质量至少是木星的0.69倍。这颗行星距离其主恒星足够近，以至于它吸收的辐射超过了其内部的热量损失。在此，我们展示了利用斯皮策空间望远镜获得的该系统的24微米波段光变曲线。它显示出与最内侧行星轨道运动的相位变化，表明这类行星具有明显的热的星下点（白昼）和冷的反星下点（夜晚）表面。
