Meteor trains and chemiluminescent processes

Astronomy and Astrophysics – Astronomy

Scientific paper

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Afterglows, Airglow, Chemiluminescence, Meteor Trails, Atmospheric Ionization, Gas Dissociation, Visual Observation

Scientific paper

Bright meteors very occasionally produce enduring visual trains that have been observed to persist for up to an hour. The source of this train luminosity is not understood although one mechanism that has long been advanced is chemiluminescence in gases. This paper assesses the role of chemiluminescent afterglow in meteor trains and the various mechanisms are reviewed quantitatively. It is shown that only if there were a high degree of atmospheric molecular dissociation in the meteoric column would observable emission be produced. However, the short lifetime of the afterglow precludes its acceptance as the major mechanism operative.

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