Query : 2002A&A...383.1049D

2002A&A...383.1049D - Astronomy and Astrophysics, volume 383, 1049-1053 (2002/3-1)

On the asymmetry of the distribution of observable comets induced by a star passage through the Oort cloud.


Abstract (from CDS):

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 (1996, Earth Moon Planets, 72, 25) 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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Journal keyword(s): comets: general - Oort cloud - solar system: general

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