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Re: (meteorobs) Modelling question
Hello Bruce,
We now know that the occurrence of Lyrid outbursts is a function of
the planetary perturbations on a 1-revolution comet dust trail.
Details are in: http://aio.arc.nasadot gov/~leonid/ICARUSLP-final.pdf
The old idea of clumps of dust in shorter orbital period orbits was
proven wrong with the observation of the 1995 alpha-Monocerotid
outburst, which was proven to be due to dust in a long-period comet
orbit. On the other hand, some clumping of dust trails occurs
due to planetary perturbations of the particle orbital period
(some stretching and compacting), by keeping particles trapped in
orbital resonances, and by loss of particles in close encounters with
the planets.
-Peter
..........................................................................
Peter Jenniskens
The SETI Institute e-mail: pjenniskens@mail.arc.nasadot gov
2035 Landings Drive tel: (650) 966-8117 or 604-3086
Mountain View, CA 94043 fax: (650) 961-9705
http://leonid.arc.nasadot gov
http://aio.arc.nasadot gov/~leonid/
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