Direct imaging and astrometric detection of a gas giant planet orbiting an accelerating star
Direct imaging and astrometric detection of a gas giant planet orbiting an accelerating star
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对绕加速恒星运行的气态巨行星的直接成像和天体测量探测
DOI：
10.1126/science.abo6192
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发表时间：
2023
期刊：
影响因子：
56.9
通讯作者：
Lawson K
中科院分区：
文献类型：
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作者：
Currie Thayne;Brandt G. Mirek;Brandt Timothy D.;Lacy Brianna;Burrows Adam;Guyon Olivier;Tamura Motohide;Liu Ranger Y.;Sagynbayeva Sabina;Tobin Taylor;Chilcote Jeffrey;Groff Tyler;Marois Christian;Thompson William;Murphy Simon J.;Kuzuhara Masayuki;Lawson K
气态巨型系外行星的直接成像提供了关于它们的大气层和行星系统结构的信息。然而，在直接成像的盲目调查中，几乎没有发现行星。使用盖亚和伊帕科斯宇宙飞船的天体测量，我们确定了围绕附近恒星HIP 99770存在气态巨行星的动力学证据。我们用斯巴鲁日冕摄影极端自适应光学仪器的直接成像证实了这颗行星的探测。这颗行星名为HIP 99770 b，距离其主星17个天文单位，接收的光线与到达木星的光线相似。它的动力学质量是13.9到16.1木星质量。行星与恒星的质量比[(7~8)×10−3]与其他直接成像的行星相似。这颗行星的大气光谱表明，这是一颗更古老、云层更少的类似于之前拍摄到的HR 8799附近的系外行星的行星。
Direct imaging of gas giant exoplanets provides information on their atmospheres and the architectures of planetary systems. However, few planets have been detected in blind surveys with direct imaging. Using astrometry from the Gaia and Hipparcos spacecraft, we identified dynamical evidence for a gas giant planet around the nearby star HIP 99770. We confirmed the detection of this planet with direct imaging using the Subaru Coronagraphic Extreme Adaptive Optics instrument. The planet, HIP 99770 b, orbits 17 astronomical units from its host star, receiving an amount of light similar to that reaching Jupiter. Its dynamical mass is 13.9 to 16.1 Jupiter masses. The planet-to-star mass ratio [(7 to 8) × 10−3] is similar to that of other directly imaged planets. The planet’s atmospheric spectrum indicates an older, less cloudy analog of the previously imaged exoplanets around HR 8799.