Processing of Chondritic and Planetary Materials in Shocks Associated with Spiral Density Waves in the Solar Nebula

Computer Science

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Chondrites, Chondrules, Solar Nebula, Spiral Arms: Nebular, Thermal Processing: Nebular

Scientific paper

An energetic nebular setting or environment has long been sought in which the material now in the planets and the chondritic meteorites was thermally processed. This paper proposes that the setting can be found behind shock fronts that accompanied the motion of spiral density waves through the solar nebula during the infall stage of nebular evolution. The substance of the nebula passed through these shock fronts many times, and each time there were opportunities for heating, melting, vaporization, chemical fractionation, and concentration of condensed matter between turbulent vortices. Only a small fraction of the potential planetary matter in the system, by responding to these opportunities, joined planetesimals and avoided being drawn into the sun.

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