Migration-driven diversity of super-Earth compositions - Archive ouverte HAL
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society: Letters Année : 2018

Migration-driven diversity of super-Earth compositions

Résumé

A leading model for the origin of super-Earths proposes that planetary embryos migrate inward and pile up on close-in orbits. As large embryos are thought to preferentially form beyond the snow line, this naively predicts that most super-Earths should be very water-rich. Here we show that the shortest-period planets formed in the migration model are often purely rocky. The inward migration of icy embryos through the terrestrial zone accelerates the growth of rocky planets via resonant shepherding. We illustrate this process with a simulation that provided a match to the Kepler-36 system of two planets on close orbits with very different densities. In the simulation, two super-Earths formed in a Kepler-36-like configuration; the inner planet was pure rock while the outer one was ice-rich. We conclude from a suite of simulations that the feeding zones of close-in super-Earths are likely to be broad and disconnected from their final orbital radii.
Fichier principal
Vignette du fichier
mnrasl_479_1_l81.pdf (989.23 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-01802973 , version 1 (01-10-2024)

Licence

Identifiants

Citer

Sean N. Raymond, Thibault Boulet, A. Izidoro, Leandro Esteves, Bertram Bitsch. Migration-driven diversity of super-Earth compositions. Monthly Notices of the Royal Astronomical Society: Letters, 2018, 479 (1), pp.L81-L85. ⟨10.1093/mnrasl/sly100⟩. ⟨hal-01802973⟩

Collections

INSU CNRS L3AB
65 Consultations
0 Téléchargements

Altmetric

Partager

More