Classical Meteor Light Curve Morphology

Details Classical Meteor Light Curve Morphology Classical Meteor Light Curve Morphology

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004em%26p...95..389b&link_type=abstract

Earth, Moon, and Planets, Volume 95, Issue 1-4, pp. 389-394

Mathematics

Logic

4

Ablation, Atmospheres, Meteoroids

Scientific paper

We investigate the morphological variation of classical meteor light curves, under the constant velocity assumption, for a series of idealized atmospheric density profiles. We look specifically at the t rise / t fall ratio, which compares the rise time to maximum brightness against the time to fall from maximum brightness. We demonstrate that for a classical meteoroid undergoing rapid ablation in an isothermal atmosphere that t rise/ t fall > 1, indicating that all such light curves are late peaked. For a classical meteoroid ablating in a region over which the density is constant, t rise/ t fall≡ 0, and the light curve is necessarily downward concave in the height vs. intensity diagram. If ablation occurs over a region in which the density increases linearly with decreasing height, then t rise/ t fall=1/(√5 - 1) ≈ 0.81, indicative of an early peaked, near symmetric light curve.

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