Cameron, A.G.W., 1965: Possible magnetospheric phenomena associated with neutron stars. Nature, 205, 787, doi:10.1038/205787a0.
With the discovery of X-ray sources in the sky, speculation has arisen that they might be associated with neutron or hyperon stars formed during the internal collapse which triggers off supernova explosions (probably of type I). Rates of cooling of neutron star models have been calculated by Morton, Chiu and Salpeter and Tsuruta. It appears that the importance of the early cooling by emission of neutrinos from the 'Urca' process has been underestimated in the foregoing investigations. With rough allowance for this effect, the calculations of Miss Tsuruta indicate that a neutron star will rapidly cool to 3 or 4×106 °K, but that after 105 years its surface temperature will still be about 2×106 °K.