Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992cemda..54..271t&link_type=abstract
Celestial Mechanics and Dynamical Astronomy (ISSN 0923-2958), vol. 54, no. 1-3, p. 271-274.
Astronomy and Astrophysics
Astronomy
1
Comets, Oort Cloud, Solar System, Celestial Mechanics, Equations Of Motion, Interacting Galaxies, Orbital Elements, Perihelions
Scientific paper
The flux of near-parabolic comets in the outer-planetary region is estimated on the presumption that the major planets and the galactic tide control the dynamics of comets. It is found that the flux of the Oort cloud comets (semi-major axis is greater than 20,000 AU) is similar to the case of a strong comet shower derived on the presumption that the galactic tidal force were not operative. On the other hand, the flux of comets with semi-major axes not greater than 20,000 AU is found to be an increasing function of q (perihelion distance) until q reaches 20 AU, while for a of about 45,000 AU it is a rapidly increasing function for q not greater than 12 AU. In other words, for comets of the inner extension of the Oort cloud the planetary perturbation acts as a strong barrier for them to penetrate into the inner planetary region.
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