Hot Jupiters were the first exoplanets to be discovered around main sequence stars and astonished us with their close-in orbits. They are a prime example of how exoplanets have challenged our textbook, solar-system inspired story of how planetary systems form and evolve. More than twenty years after the discovery of the first hot Jupiter, there is no consensus on their predominant origin channel. Three classes of hot Jupiter creation hypotheses have been proposed: in situ formation, disk migration, and high eccentricity tidal migration. Although no origin channel alone satisfactorily explains all the evidence, two major origins channels together plausibly account for properties of hot Jupiters themselves and their connections to other exoplanet populations.

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热木星的起源

热木星是在主序星周围发现的第一颗系外行星，它们的接近轨道让我们感到惊讶。它们是系外行星如何挑战我们的教科书、受太阳系启发的关于行星系统如何形成和演化的故事的一个主要例子。在发现第一颗热木星二十多年后，对于它们的主要起源通道还没有达成共识。已经提出了三类热木星形成假说：原位形成、圆盘迁移和高偏心率潮汐迁移。尽管没有单独的起源通道可以令人满意地解释所有证据，但两个主要的起源通道合起来似乎可以解释热木星本身的特性以及它们与其他系外行星种群的联系。