Cooling of a strange star with crust

Abstract
The cooling history of a strange star surrounded by a thin crust of ordinary matter is followed by solving analytically the general-relativistic equation of heat transfer across the crust. The surface temperature of the strange star is found to be lower than that of a neutron star (ordinary with core condensates) of the same age. This provides a definite observational signature for these exotic objects, so far the first quantitative one to be proposed.

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