Orbital migrations in planetesimal discs: N-body simulations and the resonant dynamical friction

We have performed N-body numerical simulations of the exchange of angular momentum between a massive planet and a 3D Keplerian disc of planetesimals. Our interest is directed at the study of the classical analytical expressions of the lineal theory of density waves, as representative of the dynamica...

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Detalles Bibliográficos
Autores principales: Cionco, Rodolfo Gustavo, Brunini, Adrián
Formato: Articulo
Lenguaje:Inglés
Publicado: 2002
Materias:
Ciencias Astronómicas
Celestial mechanics
Planetary systems
Planets and satellites: General
Solar system: Formation
Stellar dynamics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84600
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84600
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Celestial mechanics
Planetary systems
Planets and satellites: General
Solar system: Formation
Stellar dynamics
spellingShingle Ciencias Astronómicas
Celestial mechanics
Planetary systems
Planets and satellites: General
Solar system: Formation
Stellar dynamics
Cionco, Rodolfo Gustavo
Brunini, Adrián
Orbital migrations in planetesimal discs: N-body simulations and the resonant dynamical friction
topic_facet Ciencias Astronómicas
Celestial mechanics
Planetary systems
Planets and satellites: General
Solar system: Formation
Stellar dynamics
description We have performed N-body numerical simulations of the exchange of angular momentum between a massive planet and a 3D Keplerian disc of planetesimals. Our interest is directed at the study of the classical analytical expressions of the lineal theory of density waves, as representative of the dynamical friction in discs 'dominated by the planet' and the orbital migration of the planets with regard to this effect. By means of a numerical integration of the equations of motion, we have carried out a set of numerical experiments with a large number of particles (N ≥ 10 000), and planets with the mass of Jupiter, Saturn and one core mass of the giant planets in the Solar system (M<SUB>c</SUB> = 10M⊕). The torque, measured in a phase in which a 'steady forcing' is clearly measurable, yields inward migration in a minimum-mass solar disc (∑ ∼ 10 g cm<SUP>-2</SUP> ), with a characteristic drift time of ∼ a few 10<SUP>6</SUP> yr. The planets predate the disc, but the orbital decay rate is not sufficient to allow accretion in a time-scale relevant to the formation of giant planets. We found reductions of the measured torque on the planet, with respect to the linear theory, by a factor of 0.38 for M<SUB>c</SUB>, 0.04 for Saturn and 0.01 for Jupiter, due to the increase in the perturbation on the disc. The behaviour of planets whose mass is larger than M<SUB>c</SUB> is similar to the one of type II migrators in gaseous discs. Our results suggest that, in a minimum mass, solar planetesimals disc, type I migrations occur for masses smaller than M<SUB>c</SUB>, whereas for this mass value it could be a transition zone between the two types of migration.
format Articulo
Articulo
author Cionco, Rodolfo Gustavo
Brunini, Adrián
author_facet Cionco, Rodolfo Gustavo
Brunini, Adrián
author_sort Cionco, Rodolfo Gustavo
title Orbital migrations in planetesimal discs: N-body simulations and the resonant dynamical friction
title_short Orbital migrations in planetesimal discs: N-body simulations and the resonant dynamical friction
title_full Orbital migrations in planetesimal discs: N-body simulations and the resonant dynamical friction
title_fullStr Orbital migrations in planetesimal discs: N-body simulations and the resonant dynamical friction
title_full_unstemmed Orbital migrations in planetesimal discs: N-body simulations and the resonant dynamical friction
title_sort orbital migrations in planetesimal discs: n-body simulations and the resonant dynamical friction
publishDate 2002
url http://sedici.unlp.edu.ar/handle/10915/84600
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AT bruniniadrian orbitalmigrationsinplanetesimaldiscsnbodysimulationsandtheresonantdynamicalfriction
bdutipo_str Repositorios
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