MNRAS-2014-Hands-749-60.pdf (658.37 kB)
Understanding the assembly of Kepler's compact planetary systems
journal contribution
posted on 2015-10-13, 11:50 authored by T. O. Hands, Richard D. Alexander, W. DehnenThe Kepler mission has recently discovered a number of exoplanetary systems, such as Kepler-11 and Kepler-32, in which ensembles of several planets are found in very closely packed orbits (often within a few per cent of an au of one another). These compact configurations present a challenge for traditional planet formation and migration scenarios. We present a dynamical study of the assembly of these systems, using an N-body method which incorporates a parametrized model of planet migration in a turbulent protoplanetary disc. We explore a wide parameter space, and find that under suitable conditions it is possible to form compact, close-packed planetary systems via traditional disc-driven migration. We find that simultaneous migration of multiple planets is a viable mechanism for the assembly of tightly packed planetary systems, as long as the disc provides significant eccentricity damping and the level of turbulence in the disc is modest. We discuss the implications of our preferred parameters for the protoplanetary discs in which these systems formed, and comment on the occurrence and significance of mean-motion resonances in our simulations.
History
Citation
Monthly Notices of the Royal Astronomical Society, 2014, 445 (1), pp. 749-760 (12)Author affiliation
/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and AstronomyVersion
- VoR (Version of Record)
Published in
Monthly Notices of the Royal Astronomical SocietyPublisher
Oxford University Press (OUP)issn
0035-8711Acceptance date
2014-08-26Copyright date
2014Available date
2015-10-13Publisher DOI
Publisher version
http://mnras.oxfordjournals.org/content/445/1/749Language
enAdministrator link
Usage metrics
Categories
Keywords
Science & TechnologyPhysical SciencesAstronomy & Astrophysicsmethods: numericalplanets and satellites: dynamical evolution and stabilityplanets and satellites: formationplanets and satellites: individual: Kepler-11planets and satellites: individual: Kepler-32planets and satellites: individual: Kepler-80MEAN MOTION RESONANCESSTELLAR IRRADIATED DISCSISOTHERMAL GASEOUS DISKLOW-MASS PLANETST-TAURI DISKSPROTOPLANETARY MIGRATIONORBITAL EVOLUTIONSUPER-EARTHS3-DIMENSIONAL INTERACTIONMAGNETOSPHERIC ACCRETION
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC