Residual mass from atmospheric ablation of small meteoroids

Details Residual mass from atmospheric ablation of small meteoroids Residual mass from atmospheric ablation of small meteoroids

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33..315n&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, March 1985, p. 315-320. Research supported by the Natural Sciences and En

Physics

12

Ablation, Atmospheric Entry, Mass Distribution, Meteoroid Concentration, Micrometeorites, Atmospheric Effects, Micrometeoroids, Runge-Kutta Method, Velocity

Scientific paper

Numerical solutions of the equations of meteor ablation in the Earth's atmosphere have been obtained using a variable step size Runge-Kutta technique in order to determine the size of the residual mass resulting from atmospheric flight. The equations used include effects of meteoroid heat capacity and thermal radiation, and a realistic atmospheric density profile. Results were obtained for initial masses in the range 10-7 - 10-2g, and for initial velocities less than 24 km s-1 (results indicated no appreciable residual mass for meteors with velocities above 24 km s-1 in this mass range). When the results are expressed in terms of the size of the residual mass following atmospheric ablation as a function of the initial mass and velocity, it is found that the final residual mass is almost independent of the original mass of the meteoroid, but very strongly dependent on the original velocity. This strong velocity dependence coupled with the weak dependence on the original mass has important consequences for the sampling of ablation product micrometeorites.

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