Primordial metamorphism of asteroids via electrical induction in a T Tauri-like solar wind

Details Primordial metamorphism of asteroids via electrical induction in a T Tauri-like solar wind Primordial metamorphism of asteroids via electrical induction in a T Tauri-like solar wind

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..55..227h&link_type=abstract

Astrophysics and Space Science, vol. 55, no. 1, May 1978, p. 227-239.

Astronomy and Astrophysics

Astrophysics

8

Asteroids, Planetary Evolution, Solar Wind, T Tauri Stars, Astronomical Models, Electrical Resistivity, Induction Heating, Solar Magnetic Field

Scientific paper

Possible heating mechanisms for an intense thermal cycle in the early solar system are considered, and inductive asteroid heating in a T Tauri environment is examined. Calculations of thermal models based on recent measurements of the electrical conductivity of carbonaceous meteorites are reported which are presumably more representative of actual conditions in the early solar nebula. Asteroidal thermal evolution is computed using a highly simplified code that restricts induction to the dc limit of the TM mode, approximates the complete unipolar-generation differential equation by a simple series-resistance model, and restricts the modeling of thermal conduction to a calculation of heat transfer across a thin planar shell of given thickness increasing with time, which blankets a body assumed to have an isothermal core. A grid of results is obtained for 20 combinations of asteroid radius and solar distance representing the populaton of asteroids. It is found that there is a relative heating maximum with respect to body radius, that this effect is due to the operation of two distinct heating-rate restrictions which have opposite radius dependences, and that the maximum current density is roughly proportional to the inverse of interior radius.

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