RAYMOND, Sean N.; BOULET, Thibault; IZIDORO, A.; ESTEVES, Leandro; BITSCH, Bertram

doi:10.1093/mnrasl/sly100

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RAYMOND, Sean N.
ECLIPSE 2018

BOULET, Thibault

IZIDORO, A.
Universidade Estadual Paulista Júlio de Mesquita Filho = São Paulo State University [UNESP]

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Article de revue

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Monthly Notices of the Royal Astronomical Society: Letters. 2018, vol. 479, n° 1, p. L81-L85

Oxford Journals

Resumen en inglés

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.< Leer menos

Palabras clave en inglés

Astrophysics - Solar and Stellar Astrophysics

Astrophysics - Earth and Planetary Astrophysics

DOI

http://dx.doi.org/10.1093/mnrasl/sly100

Proyecto ANR

Modélisation du processus de croissance des planètes Joviennes/ - ANR-13-BS05-0003

Orígen

Importado de Hal

Centros de investigación

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804