Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....96...26f&link_type=abstract
Astronomy and Astrophysics, vol. 96, no. 1-2, Mar. 1981, p. 26-35. Research supported by the Max-Planck-Gesellschaft zur Foerde
Astronomy and Astrophysics
Astrophysics
70
Comets, Monte Carlo Method, Orbit Perturbation, Solar System, Comet Nuclei, Energy Distribution, Evaporation, Oort Cloud, Optical Properties, Orbital Elements, Planetary Orbits, Prediction Analysis Techniques, Comets, Evolution, Theoretical Studies, Perturbations, Orbits, Distance, Comparisons, Long Period Comets, Monte Carlo Techniques, Perihelion, Data, Models, Parameters, Vaporization, Revolutions, Oort Cloud, Inclination, Hypotheses, Short Period Comets, Distribution, Dynamics, Nuclei, Origin
Scientific paper
The possible origin, dynamic evolution, and planetary perturbations effects on future orbital properties of new and evolved comets within the solar system are analyzed. Numerical computations for a large sample of hypothetical comets were made using the Monte Carlo technique and the results compared to empirical data. Stellar perturbations within the Oort region, where new comets originate, play an important role in the modification of the types of cometary orbits, respective orbital energy of a comet, and its possible lifetime. According to orbital energy, the comets were classified into 'new' and 'evolved' comets, long-period comets, intermediate-period comets, and short-period comets. On the basis of the numerical data, predictions were made about the ratio between evolved and new comets and the energy distribution between evolved comets. Physical processes like vaporization and bursts are playing an important part in the cometary evolution. It is suggested that comets observed as 'new', have already passed through the planetary region beyond Jupiter's orbit and that about ten percent of the computed comets within the innermost part of the planetary region return to the Oort region.
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