Physics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvl..68.3834b&link_type=abstract
Physical Review Letters (ISSN 0031-9007), vol. 68, no. 26, June 29, 1992, p. 3834-3837. Research supported by DOE.
Physics
26
Neutrinos, Neutron Stars, Nucleons, Pions, Stellar Models, Supernova 1987A, Antiparticles, Nuclear Reactions, Stellar Evolution
Scientific paper
The wrong-helicity states of a Dirac neutrino can provide an important cooling mechanism for young neutron stars. Based on numerical models of the early cooling of the neutron star associated with SN 1987A which self-consistently incorporate wrong-helicity neutrino emission, it is argued that a Dirac neutrino of mass greater than 30 keV (25 keV if it is degenerate) leads to shortening of the neutrino burst that is inconsistent with the Irvine-Michigan-Brookhaven and Kamiokande II data. If pions are as abundant as nucleons in the cores of neutron stars, the present limit improves to 15 keV.
Burrows Adam
Gandhi Raj
Turner Michael S.
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