Orbital evolution of meteoroids from short period comets.

Details Orbital evolution of meteoroids from short period comets. Orbital evolution of meteoroids from short period comets.

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...324..770c&link_type=abstract

Astronomy and Astrophysics, v.324, p.770-777

Astronomy and Astrophysics

Astrophysics

8

Celestial Mechanics, Interplanetary Medium, Comets, P/Griegg-Skjellerup, Comet: P/Swassmann-Wachmann 1, Meteors, Meteorids

Scientific paper

We perform an accurate modelling of orbital evolution of dust grains taking into account both the ejection parameters derived from the analysis of the dust tail of each considered parent comet (Fulle, 1989A&A...217..283F), and the integration of the Newton equations in the context of a nine-body problem (Sun, seven major planets and the dust particle) plus solar radiation and wind forces. Among Short Period Comets (SPC) we have selected P/Schwassmann-Wachmann 1 (P/SW1) and P/Griegg-Skjellerup (P/GS), which represent two significantly different objects from a dynamical point of view. Dust from P/SW1 is dominated by Jupiter perturbations: after 2x10^4^-years, about 7% of the grains are ejected in hyperbolic orbits, 80% of the grains have the perihelion out of 4AU from the Sun, and only 1% of them reaches the Sun distance of 1AU, thus contributing to the inner zodiacal cloud. Dust from P/GS is dominated by the P-R drag, although large grains, due to their longer collapse lifetime, are sensitive to Jupiter perturbations. Therefore the Tisserand criterion represents a useful tool both to estimate the orbital evolution of grains larger than 100μm (i.e. the most likely canditates to replenish the zodiacal dust cloud, Gruen et al. 1985Icar...62..244G), and in distinguishing the parent sources of meteoroids collected with near Earth space experiments able to measure the impact velocity vectors. Jupiter perturbations oppose to the P-R drag forces and reduce significantly the contribution of SPC to the inner zodiacal dust: the simple sum of the dust mass contribution from each SPC may be an overestimate of their actual supply.

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