Thermal cycling and fluctuations in the protoplanetary nebula

Details Thermal cycling and fluctuations in the protoplanetary nebula Thermal cycling and fluctuations in the protoplanetary nebula

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...76..391m&link_type=abstract

Icarus (ISSN 0019-1035), vol. 76, Dec. 1988, p. 391-403.

Physics

3

Cooling, Nebulae, Planetary Evolution, Protoplanets, Solar System, Accretion Disks, Condensation, Opacity, Refractory Materials, Sublimation, Temperature Distribution

Scientific paper

A perturbation analysis of the cooling of protoplanetary nebula indicates that the protoplanetary disk's inner transition may undergo temperature oscillations as a result of a rapid heat-input process which temporarily changes its conditions from the average. This transition region is definable as the disk zone in which dust grains are heated to their sublimation temperature; in this way, they modify the disk's opacity through sublimation and condensation processes. The temperature oscillations arising from a rapid heating event, and the opacity changes associated with dust grain evaporation and condensation, create heating rates faster by a factor of 1000 than the convective time-scales associated with disk processes.

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