Origins of Hot Jupiters

By R. Dawson, J. Johnson. Annual Review of Astronomy and Astrophysics, 2018

425 citations recorded by the source corpus.

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 origin channels together plausibly account for properties of hot Jupiters themselves and their connections to other exoplanet populations.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/89f914bd08dce79fee33e92f0c1cce8481243d1d

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Citations in the corpus

• Astrochemistry and compositions of planetary systems (2020, background): “Many of these exoplanets are strange compared to expectations from the solar system (Winn and Fabrycky 2015; Dawson and Johnson 2018), and planetary compositions are emerging as a major tool to constrain the origins of specific planets, as”
• The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au (2019, background): “…reasons, together with the many arguments pointing to inward migration of hot Jupiters by Kozai cycles/tidal friction and perhaps also disk torques (Dawson & Johnson 2018), lead us to posit a “sweet spot” for gas giant formation at stellocentric distances that are neither too large nor too small.”
• Photoevaporation and high-eccentricity migration created the sub-Jovian desert (2018, background): “While high-eccentricity migration still suffers from several unsolved theoretical problems, it appears to be the dominant process for generating short-period giant planets (see Dawson & Johnson 2018 for a recent review).”