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Title:
Gamma-ray constraints on Na-22 yields in nova explosions
Authors:
Higdon, J. C.; Fowler, William A.
Affiliation:
AA(California Institute of Technology, Jet Propulsion Laboratory, Pasadena), AB(California Institute of Technology, Pasadena)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 317, June 15, 1987, p. 710-716. (ApJ Homepage)
Publication Date:
06/1987
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Gamma Ray Astronomy, Interstellar Matter, Novae, Nuclear Fusion, Sodium 22, Monte Carlo Method, Spatial Distribution
DOI:
10.1086/165317
Bibliographic Code:
1987ApJ...317..710H

Abstract

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.

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