Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...149..239n&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 2, Aug. 1985, p. 239-245. Sponsorship: Ministry of Education, Science
Astronomy and Astrophysics
Astronomy
72
Low Temperature Environments, Neutron Stars, Nuclear Reactions, Stellar Mass Accretion, White Dwarf Stars, Gamma Ray Bursts, Helium, Reaction Kinetics, Supernovae, X Ray Astronomy
Scientific paper
The triple-alpha reaction is reviewed for low temperature (and high density) conditions which are important in accreting white dwarfs and neutron stars. The alpha + alpha and Be-8 + alpha reactions are found to be dominated by nonresonant terms for T of less than 28 million K and 74 million K, respectively; those have not been included in previous calculations. A general formula is given for the triple-alpha reaction rate which holds for the resonant and nonresonant regime; this deviates from the resonant rate up to 20 orders of magnitude at T of less than about 30 million K. Consequences for helium burning in accreting white dwarfs and neutron stars are presented which involve models for Type I supernovae, and gamma-ray and X-ray bursts.
Miyaji Shigeki
Nomoto Ken
Thielemann Friederich-Karl
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