On the discrepancy between supply and loss of observable long-period comets

Details On the discrepancy between supply and loss of observable long-period comets On the discrepancy between supply and loss of observable long-period comets

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.240...69y&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 240, Sept. 1, 1989, p. 69-72.

Astronomy and Astrophysics

Astronomy

4

Comets, Cosmology, Eccentric Orbits, Oort Cloud, Solar System, Molecular Clouds, Orbital Elements, Perihelions, Periodic Variations, Perturbation Theory, Comets, Long-Period Comets, Perturbations, Orbital Elements, Tidal Effects, Gravity Effects, Distribution, Abundance, Perihelion, Distance, Orbits, Calculations, Theoretical Studies, Flux, Solar System, Escape, Catalog

Scientific paper

Long-period comets that are unobservable owing to large perihelion distances are brought to the observable region by the perturbation of the galactic tidal force, while they are lost by planetary as well as galactic perturbations. Both the galactic and planetary perturbations have been calculated for observed long-period comets for which accurate orbital elements are known. It is possible to identify which comets are being newly supplied and which comets are being lost. The supply of new comets is shown to be significantly greater than the loss, so that the present cometary population does not appear to be in a steady state. This strongly suggests that the cometary cloud was disturbed in the recent past and the most likely candidate for the disturbance appears to be a giant molecular cloud.

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