论文标题
气体巨型行星的直接成像和天体检测旋转加速恒星
Direct Imaging and Astrometric Detection of a Gas Giant Planet Orbiting an Accelerating Star
论文作者
论文摘要
天然气巨头系外行星的直接成像提供了有关行星气氛和行星系统体系结构的关键信息。但是，在用于实现成像探测的盲目调查中，很少有人检测到行星。使用GAIA和HIPPARCOS天文学，我们确定了附近恒星髋关节99770周围的气体巨星的动态证据，然后通过与Subaru Coronagraphic Extreme Adaptive Optics项目直接成像确认了这一行星。 HIP 99770 B轨道的宿主恒星17个天文单元，可轻松抗性，可与木星的巨人相当，动态质量为13.9--16.1木星质量。它的星球与星级质量比（7--8 $ \ times $ 10 $^{ - 3} $）与其他直接成像的行星相当。地球的气氛类似于较旧的，不太云的类似物，即HR 8799周围先前成像的系外行星的大气。
Direct imaging of gas giant exoplanets provides key information on planetary atmospheres and the architectures of planetary systems. However, few planets have been detected in blind surveys used to achieve imaging detections. Using Gaia and Hipparcos astrometry we identified dynamical evidence for a gas giant planet around the nearby star HIP 99770 and then confirmed this planet by direct imaging with the Subaru Coronagraphic Extreme Adaptive Optics Project. HIP 99770 b orbits 17 astronomical units from its host star, with an insolation comparable to Jupiter's and a dynamical mass of 13.9--16.1 Jupiter masses. Its planet-to-star mass ratio (7--8$\times$10$^{-3}$) is comparable to that other directly-imaged planets. The planet's atmosphere resembles an older, less-cloudy analogue of the atmospheres of previously-imaged exoplanets around HR 8799.
