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Modelling the Ejection of Meteoroids from Comets

Published online by Cambridge University Press:  27 February 2018

J. Jones  and
P. Brown
J. Jones
Affiliation:
Physics Department, University of Western Ontario, London, Ontario, Canada, N6A 3K7
P. Brown
Affiliation:
Physics Department, University of Western Ontario, London, Ontario, Canada, N6A 3K7

Abstract

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We have reworked Whipple's (1951) theory of the ejection of meteoroids from comets to include the effects of cooling by the sublimation of the cometary ice and the adiabatic expansion of the escaping gases. We consider only those particles moving significantly slower than the gas speed and find that the inclusion of these effects does not yield results much different from Whipple's theory. We have extended the theory to include the case of an active area in the form of a spherical cap and have shown how the characteristics of the ejection process change when the cap is in the form of a pit or a depression. We present a empirical formulae which should be useful to modellers of meteor stream evolution.

Type
III. Meteoroid Streams
Information
International Astronomical Union Colloquium , Volume 150: Physics, Chemistry and Dynamics of Interplanetary Dust , 1996 , pp. 137 - 140
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Gombosi, T.I., Nagy, A.F. & Cravens, T.E. 1986 Rev Geophys, 24, 667.Google Scholar
Probstein, R.F., 1968 in “Problems of Hydrodynamics and Continuum Mechanics”, p 568. Society for Industrial and Applied Mathematics, Philadelphia, Pa. Google Scholar
Whipple, F.L. 1951. ApJ, 113, 464 Google Scholar