IALP 13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
On the number of particles in N-body simulations of planetdisk interaction
Autor/es:
ADRIÁN BRUNINI; PABLO SANTAMARÍA; HÉCTOR VITURRO; RODOLFO CIONCO
Revista:
PLANETARY AND SPACE SCIENCE
Editorial:
Elsevier Ltd.
Referencias:
Año: 2007 vol. 55 p. 2121 - 2127
ISSN:
0032-0633
Resumen:
In this paper we present a new mixed-variables symplectic tree code for planetesimal dynamics, which allows to use a very largenumber of particles in numerical simulations of planetdisk interaction. Furthermore, we discuss how a wrong election of the number ofparticles to model a planetesimal disk, in order to carry out realistic numerical simulations, can cause spurious result. If the particlenumber is not enough, the close encounter between the planet and unrealistic massive particles will introduce a stochastic component ofplanet migration. This has an impact on the migration rate and it can even change its sign. Finally, we describe how to determine theminimum number of disk particles that should be used in numerical simulations, in order to have a correct description of the interaction,especially when the dynamical friction on the planet is the relevant mechanism of migration.r 2007 Elsevier Ltd. All rights reserved.
