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The Formation and Evolution of the Perseid Meteoroid Stream

Published online by Cambridge University Press:  27 February 2018

Nathan W. Harris*
Affiliation:
Astrophysics Research Group, School of Electrical Engineering, Electronics & Physics, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK

Abstract

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The orbital evolution of two modelled ‘Perseid’ meteoroid streams is investigated using direct numerical integration techniques. We conclude that, in the absence of significant meteoroid velocity determination errors, the observed meteoroid orbital semi-major axis distribution is a direct consequence of the cometary ejection process and not due to subsequent orbital evolution. A high ejection-velocity (~ 0.6 km s-1) model stream succeeds in reproducing the observations. Conclusions are made concerning how the orbital stability of Earth-orbit-intersecting Perseid metecroids varies with initial orbital semi-major axis.

Type
III. Meteoroid Streams
Copyright
Copyright © Astronomical Society of the Pacific 1996

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