Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.198...23j&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 198, Jan. 1982, p. 23-32. Research supported by the Natural Sciences an
Astronomy and Astrophysics
Astronomy
10
Annual Variations, Geminid Meteoroids, Meteoroid Concentration, Meteoroid Showers, Comets, Fine Structure, Monte Carlo Method, Perihelions
Scientific paper
An attempt is made to reconcile the theory of dispersion of concentrations of meteoroids around the orbit with observational data, and it is found that shower activity variations yield information about the cometary surface and its mode of disintegration. An intrinsic fluctuating component in the activity of the Geminid shower is explained in terms of distinct streamlets produced from the fragments of a disintegrated comet. It is indicated by comparisons with theory that the streamlet particles were uniformly ejected around one orbit of the parent cometary fragment, rather than close to perihelion. Support is also found for an insulating layer on the cometary surface, and it is determined in light of Monte Carlo simulations that 100 years of observation are needed to resolve the power spectrum fine structure of the shower activity.
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