Effects of regolith/megaregolith insulation on the cooling histories of differentiated asteroids

Details Effects of regolith/megaregolith insulation on the cooling histories of differentiated asteroids Effects of regolith/megaregolith insulation on the cooling histories of differentiated asteroids

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.5111h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, April 10, 1990, p. 5111-5124. Research supported by SNFO and Henrikse

Astronomy and Astrophysics

Astronomy

47

Asteroids, Planetary Evolution, Regolith, Thermal Conductivity, Astronomical Models, Cooling, Heat Transfer, Stratigraphy, Asteroids, Regolith, Thermal History, Cooling, Differentiation, Core, Conductivity, Thickness, Parent Bodies, Parameters, Radius, Cratering, Size, Models, Iron Meteorites, Pallasites, Meteorites, Evolution, Numerical Methods, Stratigraphy, Diagrams, Calculations, Mantle

Scientific paper

The cooling histories of differentiated asteroids are calculated employing a variety of thermal-conductivity structures to simulate the potential insulating effects of regolith and megaregolith layers on the cooling rate. It was found that a combination of relatively thick megaregolith and regolith can potentially reduce the core cooling rate by more than a factor of 10 below the rate predicted by models with conventional thermal conductivity structure. Thus, differences in cratering (regolith production) histories may have resulted in radically different cooling rates for asteroids of similar radius, or in similar cooling rates from asteroids of different radius.

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