Gamma-ray constraints on Na-22 yields in nova explosions
The longitudinal distribution of diffuse 1.275 MeV emission produced by the decay of interstellar Na-22 generated by a limited class of energetic novae-accreting ONeMg white dwarfs is modeled. The probability distributions for the locations of disk novae are derived as functions of Galactocentric cylindrical coordinates. The occurrence rate for novae of all classes in the Galactic disk is about 30/yr. An occurrence rate of about 16/yr is found for spheroid novae of all classes. By comparing these simulation results with HEAO 3 upper limits on diffuse 1.275 MeV emission, upper limits of (3-5.6) x 10 to the -7th solar mass are determined for the mean Na-22 yield for energetic novae generated by accreting ONeMg white dwarfs. These Na-22 limits constrain future models of explosive nucleosynthesis in energetic nova explosions. 27 references.
- Research Organization:
- California Institute of Technology, Pasadena
- OSTI ID:
- 6086264
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 317; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COMPARATIVE EVALUATIONS
DISTRIBUTION
DWARF STARS
ERUPTIVE VARIABLE STARS
GALAXIES
ISOTOPES
LIGHT NUCLEI
LIMITING VALUES
MASS
MILKY WAY
MONTE CARLO METHOD
NOVAE
NUCLEI
NUCLEOSYNTHESIS
ODD-ODD NUCLEI
RADIOISOTOPES
SODIUM 22
SODIUM ISOTOPES
SPATIAL DISTRIBUTION
STAR ACCRETION
STAR EVOLUTION
STARS
SYNTHESIS
VARIABLE STARS
WHITE DWARF STARS
YEARS LIVING RADIOISOTOPES