On the origin of extraterrestrial stratospheric particles: Interplanetary dust or meteor ablation debris?

Computer Science

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Ablation, Interplanetary Dust, Micrometeoroids, Particulate Sampling, Stratosphere, Granular Materials, Meteoritic Composition, Mineralogy, U-2 Aircraft

Scientific paper

Meteor ablation debris was distinguished from unablated interplanetary dust in a collection of extraterrestrial particles collected in the stratosphere using NASA U-2 aircraft. A 62 g sample of the Murchison (C2) meteorite was artificially ablated to characterize ablation debris for comparison with the stratospheric particles. By using proper experimental conditions, artificial ablation debris can be produced that is similar to natural ablation debris. Analyses of natural fusion crusts, artificial fusion crust, and artificial ablation debris of the Murchison meteorite produced criteria for recognizing debris ablated by a primitive meteoroid. Ninety-five percent of the stratospheric particles can be described as either ablation debris from a primitive meteoroid, or as very primitive interplanetary dust.

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