Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993astl...19..104g&link_type=abstract
Astronomy Letters, Vol. 19, p. 104-107; Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 19, no. 3, p. 280-287. In Russ
Astronomy and Astrophysics
Astronomy
10
Neutrinos, Neutron Stars, Nucleons, Stellar Cores, Stellar Temperature, Cool Stars, Stellar Luminosity, Surface Temperature
Scientific paper
The cooling of a neutron star with a standard interior composition is simulated numerically under the assumption that neutrino energy loss is determined by direct URCA processes in the inner stellar core. Exact factors are used to describe the reduction of the neutrino luminosity and heat capacity by nucleon superfluidity. As was the case with the first calculations of Page and Applegate (1992), the surface temperature of a star aged 1000 to 100,000 yr is determined solely by the critical temperature of the appearance of the superfluidity in the inner stellar core where direct URCA processes are allowed. However, exact consideration of the superfluidity effects leads to a lower surface temperature.
Gnedin Oleg Yuri
Yakovlev Dmitry G.
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