Gratton Raffaele, Mesa Dino, Bonavita Mariangela, Zurlo Alice, Marino Sebastian, Kervella Pierre, Desidera Silvano, D'Orazi Valentina, Rigliaco Elisabetta
INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, Padova, I-35122, Italy.
School of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK.
Nat Commun. 2023 Oct 17;14(1):6232. doi: 10.1038/s41467-023-41665-0.
Radial velocity surveys suggest that the Solar System may be unusual and that Jupiter-like planets have a frequency < 20% around solar-type stars. However, they may be much more common in one of the closest associations in the solar neighbourhood. Young moving stellar groups are the best targets for direct imaging of exoplanets and four massive Jupiter-like planets have been already discovered in the nearby young β Pic Moving Group (BPMG) via high-contrast imaging, and four others were suggested via high precision astrometry by the European Space Agency's Gaia satellite. Here we analyze 30 stars in BPMG and show that 20 of them might potentially host a Jupiter-like planet as their orbits would be stable. Considering incompleteness in observations, our results suggest that Jupiter-like planets may be more common than previously found. The next Gaia data release will likely confirm our prediction.
径向速度调查表明，太阳系可能并不寻常，在类太阳恒星周围，类似木星的行星出现频率小于20%。然而，在太阳附近最紧密的星协之一中，它们可能更为普遍。年轻的移动恒星群是系外行星直接成像的最佳目标，通过高对比度成像，已经在附近的年轻绘架座移动星群（BPMG）中发现了四颗类似木星的大质量行星，欧洲航天局的盖亚卫星通过高精度天体测量法又发现了另外四颗。在此，我们分析了BPMG中的30颗恒星，结果表明其中20颗可能潜在地拥有一颗类似木星的行星，因为它们的轨道是稳定的。考虑到观测的不完整性，我们的结果表明，类似木星的行星可能比之前发现的更为普遍。盖亚的下一次数据发布可能会证实我们的预测。
