Direct URCA process in neutron stars

Details Direct URCA process in neutron stars Direct URCA process in neutron stars

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvl..66.2701l&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 66, May 27, 1991, p. 2701-2704.

Physics

400

Neutrinos, Neutron Stars, Nuclear Fusion, Particle Energy, Early Stars, Spectral Bands, Supernova 1987A

Scientific paper

It is shown that the direct URCA process can occur in neutron stars if the proton concentration exceeds some critical value in the range 11-15 percent. The proton concentration, which is determined by the poorly known symmetry energy of matter above nuclear density, exceeds the critical value in many current calculations. If it occurs, the direct URCA process enhances neutrino emission and neutron star cooling rates by a large factor compared to any process considered previously.

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