A tree code for planetesimal dynamics: comparison with a hybrid direct code

Details A tree code for planetesimal dynamics: comparison with a hybrid direct code A tree code for planetesimal dynamics: comparison with a hybrid direct code

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003mnras.346..924b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 346, Issue 3, pp. 924-932.

Astronomy and Astrophysics

Astronomy

2

Accretion, Accretion Discs, Methods: Numerical, Celestial Mechanics, Solar System: General

Scientific paper

We present a tree code for simulations of collisional systems dominated by a central mass. We describe the implementation of the code and the results of some test runs with which the performance of the code was tested. A comparison between the behaviour of the tree code and a direct hybrid integrator is also presented. The main result is that tree codes can be useful in numerical simulations of planetary accretion, especially during intermediate stages, where possible runaway accretion and dynamical friction lead to a population with a few large bodies in low-eccentricity and low-inclination orbits embedded in a large swarm of small planetesimals in rather excited orbits. Some strategies to improve the performance of the code are also discussed.

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