Va. Urpin et Ka. Vanriper, CRUSTAL MAGNETIC-FIELD DECAY IN NEUTRON-STARS AND THE NATURE OF SUPERDENSE MATTER, The Astrophysical journal, 411(2), 1993, pp. 120000087-120000090
The decay of a magnetic field anchored in the crust of a neutron star
strongly depends on the state of the core matter in which the density
exceeds that of nuclei. This dependence is a consequence of the temper
ature dependence of the electrical conductivity and hence the thermal
history of the neutron star. The thermal evolution is determined by th
e properties of high-density core matter. Information about the state
of this matter can be obtained from analysis of field decay even when
the magnetic field is confined to the surface layers. We compare the f
ield decay for two neutron star cooling models. One model includes onl
y ''standard'' neutrino emissivities; the other presents an example of
accelerated cooling by enhanced neutrino emission from the core. Our
simulations show a large qualitative difference in evolution of the cr
ustal field for these models, with much less field decay in the case o
f rapid cooling.