Solar flare track densities in interplanetary dust particles The determination of an asteroidal versus cometary source of the zodiacal dust cloud

Details Solar flare track densities in interplanetary dust particles The determination of an asteroidal versus cometary source of the zodiacal dust cloud Solar flare track densities in interplanetary dust particles The determination of an asteroidal versus cometary source of the zodiacal dust cloud

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...68..377s&link_type=abstract

Icarus (ISSN 0019-1035), vol. 68, Dec. 1986, p. 377-394.

Computer Science

33

Asteroids, Comets, Interplanetary Medium, Particle Tracks, Zodiacal Dust, Density (Number/Volume), Grains, Particle Trajectories, Solar Flares, Stratosphere

Scientific paper

The possibility is explored whether an IDP (interplanetary dust particle) is cometary or asteroidal from measurements of the solar flare track density within its constituent mineral grains. Dust particles that are larger than 1 micron, when injected into the Solar System from comets and asteroids, will spiral into the sun due to the Poynting-Robertson effect. During the process of spiraling in, such dust particles accumulate solar flare tracks. The accumulated track density for a given dust grain is a function of the duration of its space exposure and its distance from the sun. Using a computer model, it was determined that the expected track density distributions from grains produced by comets are very different from those produced by asteroids. Individual asteroids produce populations of particles that arrive at 1 AU with scaled track density distributions containing 'spikes,' while comets supply particles with a flatter and wider distribution of track densities.

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