Evaporation of High Speed Sporadic Meteors
RADEX INC BEDFORD MA
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Recent measurements conducted at the Arecibo Observatory report high-speed sporadic meteors having velocities near 50 kms. The results seem to indicate a bimodal velocity distribution in the sporadic meteors maxima at approximately 20 kms and approximately 50 kms. The particles have a maximum mass of approximately 1 microgram. This paper will present an analysis of the ablation of 1 microgram meteoroids having velocities of 20, 30, 50 and 70 kms. The calculations show that there is fractionation even for the fast meteoroids, the effect being particularly noticeable for the 1 microgram sporadic particles, and less so for the heavier particles. The relevance of the calculations to the radar observations of the sporadic meteors will be discussed. 5 figures, 24 refs.
- Physical Chemistry