Thermal Processing in Protoplanetary Nebulae

Details Thermal Processing in Protoplanetary Nebulae Thermal Processing in Protoplanetary Nebulae

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pdac.book..230a&link_type=abstract

Protoplanetary Dust: Astrophysical and Cosmochemical Perspectives, eds.: D. Apai, D. S. Lauretta, 2010, Cambridge University Pre

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Planet Formation, Dust, Meteorites, Thermal Processing, Crystalline Silicates, Spitzer, Stardust, Infrared Spectroscopy, Protoplanetary Dust, Dust Processing, Protoplanetary Disk, Brown Dwarf, Chondrule, Transition Disk

Scientific paper

Crystalline silicates around other stars demonstrate that protoplanetary material is often heated or processed. Similarly, primitive Solar System materials (chondrule components, IDPs, Stardust samples, comet grains) provide multiple lines of evidence for repeated dramatic heating events that affected most or all the protoplanetary materials in the first few million years. The existence of such powerful heating events is not predicted or understood from planet formation models, yet may have had important implications on the status and composition of planetary raw materials. Here we synthesize the astronomical and meteoritic evidence for such events and discuss proposed models. By matching astronomical analogs to events in the young Solar System we attempt to reconstruct a possible scenario for the thermal processing of protoplanetary materials consistent with all evidence. We also highlight details where the astronomical and cosmochemical views are difficult to reconcile and identify key directions for future research.

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