Planet X and the origins of the shower and steady state flux of short-period comets

Details Planet X and the origins of the shower and steady state flux of short-period comets Planet X and the origins of the shower and steady state flux of short-period comets

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...65...37m&link_type=abstract

Icarus (ISSN 0019-1035), vol. 65, Jan. 1986, p. 37-50.

Astronomy and Astrophysics

Astronomy

19

Astronomical Models, Meteoroid Showers, Planets, Orbital Elements, Oscillations, Planetary Evolution, Steady State, Comets, Short-Period Comets, Planet X, Origin, Flux, Orbits, Dynamics, Perturbations, Models, Mass, Motion, Celestial Mechanics, Interactions, Analysis, Giant Planets, Gravity Effects, Tidal Effects, Scattering, Inclination, Position (Location), Parameters

Scientific paper

An extensive analysis of the planet X model is presented. Unlike prior analyses, it takes into account the fact that only those comets scattered directly into the zones of influence (ZOI) of Saturn and Jupiter can contribute to a shower whose duration is in agreement with observation. It is predicted that some of the comets scattered directly into ZOI of Uranus and Neptune wiwll evolve on time scales of about 100 million years into the steady state flux of short-period comets. The absolute numbers of shower and steady state comets were found to be comparable with the known terrestrial cratering rate, assuming the existence of long-lived extinct comet cores. Canonical planet X model parameters are given, and it is suggested that planet X, in its present orbit, can create the requisite density gradient of comets near perihelion and aphelion during the lifetime of the solar system. It is concluded that the existence of planet X and the comet disk can explain the origin of the steady state flux of short-period comets over a wide range of parameters.

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