IZIDORO, A.; RAYMOND, Sean N.; MORBIDELLI, Alessandro,; HERSANT, F.; PIERENS, A.

doi:10.1088/2041-8205/800/2/L22

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IZIDORO, A.
ECLIPSE 2015

RAYMOND, Sean N.
ECLIPSE 2015

MORBIDELLI, Alessandro,
Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides [CASSIOPEE]

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The Astrophysical journal letters. 2015, vol. 800, n° 2, p. id. L22

Bristol : IOP Publishing

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Planets of 1-4 times Earth's size on orbits shorter than 100 days exist around 30-50% of all Sun-like stars. In fact, the Solar System is particularly outstanding in its lack of "hot super-Earths" (or "mini-Neptunes"). These planets -- or their building blocks -- may have formed on wider orbits and migrated inward due to interactions with the gaseous protoplanetary disk. Here, we use a suite of dynamical simulations to show that gas giant planets act as barriers to the inward migration of super-Earths initially placed on more distant orbits. Jupiter's early formation may have prevented Uranus and Neptune (and perhaps Saturn's core) from becoming hot super-Earths. Our model predicts that the populations of hot super-Earth systems and Jupiter-like planets should be anti-correlated: gas giants (especially if they form early) should be rare in systems with many hot super-Earths. Testing this prediction will constitute a crucial assessment of the validity of the migration hypothesis for the origin of close-in super-Earths.< Réduire

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Astrophysics - Earth and Planetary Astrophysics

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Gas giant planets as dynamical barriers to inward-migrating super-Earths

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