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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Migration-driven diversity of super-Earth compositions

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Author(s):
Raymond, Sean N. [1, 2] ; Boulet, Thibault [3] ; Izidoro, Andre [4] ; Esteves, Leandro [4] ; Bitsch, Bertram [5]
Total Authors: 5
Affiliation:
[1] CNRS, Lab Astrophys Bordeaux, Allee Geoffroy St Hilaire, F-33165 Pessac - France
[2] Univ Bordeaux, Allee Geoffroy St Hilaire, F-33165 Pessac - France
[3] Inst Astrophys & Geophys, Lab Imagerie Syst Stellaires & Planetaires, B-4000 Liege - Belgium
[4] Univ Estadual Paulista, UNESP, Grp Dinam Orbital Planetol Guaratingueta, BR-12516410 Sao Paulo - Brazil
[5] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg - Germany
Total Affiliations: 5
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 479, n. 1, p. L81-L85, SEP 2018.
Web of Science Citations: 11
Abstract

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 snowline, 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. (AU)

FAPESP's process: 17/09963-7 - Numerical modeling of planetary systems formation and dynamics
Grantee:Leandro Esteves de Paula
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 16/19556-7 - Planetary Formation and Dynamics: from the Solar System to Exoplanets
Grantee:André Izidoro Ferreira da Costa
Support Opportunities: Scholarships in Brazil - Young Researchers
FAPESP's process: 16/12686-2 - Planetary formation and dynamics: from the Solar System to exoplanets
Grantee:André Izidoro Ferreira da Costa
Support Opportunities: Research Grants - Young Investigators Grants