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Issue A&A
Volume 428, Number 1, December II 2004
Page(s) 247 - 253
Section Planets and planetary systems
DOI http://dx.doi.org/10.1051/0004-6361:20041225



A&A 428, 247-253 (2004)
DOI: 10.1051/0004-6361:20041225

The transparency of the Solar System to the Oort cloud comets

P. A. Dybczynski

Astronomical Observatory of the A. Mickiewicz University, Sloneczna 36, 60-286 Poznan, Poland
    e-mail: dybol@amu.edu.pl

(Received 4 May 2004 / Accepted 7 August 2004)

Abstract
In long-term Monte Carlo simulations of the dynamics of the Oort cloud planetary perturbations cannot be taken directly into account. To do this we propose a simple approximation: estimating the Solar System transparency coefficient P measuring the probability for a comet to be removed from the cloud by planetary perturbations during a single perihelion passage. We estimated the value of this coefficient from the observed and artificial cometary samples. We excluded nongravitational forces fom our calculations. We obtained $P\cong0.25$ for inner cloud comets and $P\cong0.5$ for the outer and most active part of the cloud. The dependency of P on the comet observability limit ${\it OL}$ is also presented for various cometary samples.


Key words: comets: general -- Oort cloud -- planets and satellites: general

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