Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...339..956h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 339, April 15, 1989, p. 956-961. Research supported by the W. M. Keck Found
Astronomy and Astrophysics
Astrophysics
12
Aluminum Isotopes, Galactic Radiation, Gamma Ray Spectra, Milky Way Galaxy, Novae, Nuclear Reactions, Angular Distribution, Emission Spectra, Line Spectra, White Dwarf Stars
Scientific paper
Diffuse Galactic 1.809 MeV line emission, produced by the decay of the radionuclide Al-26 is modeled for nova distributions. Two distinct nova contributions were investigated: accreting carbon-oxygen white dwarfs and accreting oxygen-neon-magnesium white dwarfs. It is demonstrated that the modeled diffuse emissions, as functions of Galactic longitude, are significantly different for these two nova types. These differences result because, first, carbon-oxygen and oxygen-neon-magnesium white dwarfs can be remnants of different stellar populations, and second, Al-26 production by carbon-oxygen white dwarfs is expected to be systematically lower for novae located in the Galactic spheroid than for novae situated in the Galactic disk.
Fowler William A.
Higdon James C.
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