Persistent Leonid meteor trails: Types I and II

Details Persistent Leonid meteor trails: Types I and II Persistent Leonid meteor trails: Types I and II

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.495..215d&link_type=abstract

In: Proceedings of the Meteoroids 2001 Conference, 6 - 10 August 2001, Kiruna, Sweden. Ed.: Barbara Warmbein. ESA SP-495, Noordw

Physics

Meteors, Leonids, Meteor Trails

Scientific paper

A campaign to study the trails left behind by bright Leonid meteors was conducted in November 1998 and 1999. These mysterious lingering trails have been observed for up to an hour. Such persistence allowed a visual observer at the Starfire Optical Range on Kirtland Air Force Base, near Albuquerque, New Mexico, USA, to direct a sodium resonance laser, a CCD camera, and an intensified video camera to the trail within two minutes of the meteor's appearance. Subsequent study of this data has identified two kinds of trails, Type I and II, although both may be found in a single trail. Type I trails appear turbid, wider (1 km), and otpically thicker than Type II trails, and show very high diffusion rates of 800 m2s-1. Type I trails also have higher line emission rates, and Type II trails often appear parallel. This latter phenomenon is still unexplained.

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