Dynamical friction induces perturbations on Oort cloud comets

Details Dynamical friction induces perturbations on Oort cloud comets Dynamical friction induces perturbations on Oort cloud comets

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993cemda..57r.406b&link_type=abstract

Celestial Mechanics and Dynamical Astronomy (ISSN 0923-2958), vol. 57, no. 1-2, p. 406

Astronomy and Astrophysics

Astronomy

Aphelions, Comets, Friction, Oort Cloud, Orbit Perturbation, Solar Orbits, Mass Distribution, Perihelions, Solar Neighborhood

Scientific paper

The aphelia distribution of Oort cloud comets is recognized to be strongly modulated by tidal galactic perturbations. However, near 15% of nonrandomness in the aphelia distribution in galactic latitudes is not explained by this type of interaction between the Galaxy and the solar system. We demonstrate that this nonrandomness is a real phenomenon and is not an observational selection effect. We consider the impulse transfer of the Sun on the overall uniform distribution of mass in the solar neighborhood induced by the solar motion relative to the local standard of rest. If the perturbation is averaged and limited to the first-order terms, an analytic solution for the loss rate of comets is possible. A good agreement with the observed asymmetry is found. Furthermore, the theory predicts the observed distribution of perihelia longitudes.

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