Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-08-23
Acta Phys.Polon.B30:1125,1999
Astronomy and Astrophysics
Astrophysics
24 pages, 4 figures, latex, uses appb.sty
Scientific paper
We study neutrino energy emission rates (emissivities) due to electron bremsstrahlung produced by $ee$ and $ep$ collisions in the superfluid neutron star cores. The neutrino emission due to $ee$ collisions is shown to be the dominant neutrino reaction at not too high temperatures ($T \la 10^8$ K) in dense matter if all other neutrino reactions involving nucleons are strongly suppressed by neutron and proton superfluidity. Simple practical expressions for the $ee$ and $ep$ neutrino emissivities are obtained. The efficiency of various neutrino reactions in the superfluid neutron-star cores is discussed for the cases of standard neutrino energy losses and the losses enhanced by the direct Urca process.
Haensel Pawel
Kaminker A. D.
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