Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...383.1049d&link_type=abstract
Astronomy and Astrophysics, v.383, p.1049-1053 (2002)
Astronomy and Astrophysics
Astrophysics
5
Comets: General, Oort Cloud, Solar System: General
Scientific paper
Single passage of a star through the Oort cloud yields anisotropic distribution of observable long period comets. This conclusion emerges from our extensive Monte Carlo simulations of the directional distribution of long-period comets induced by a stellar passage through the Oort cloud. For a broad range of simulation parameters we obtained the asymmetric distribution of comets as result of a single stellar passage. A direct result of our simulation is a guide-line for studies of the anisotropies in the observed long-period comet sample and searching for fingerprints of a recent stellar passage. We obtained an isotropic distribution, as simulated by Weissman (\cite{weissman:1996a}) only for a very peculiar choice of input parameters. The accuracy of our calculations was verified by consistency of the impulse approximation and direct orbit integration results.
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