Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...294..591l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 294, July 15, 1985, p. 591-598. Research supported by the Robert A. Welch F
Astronomy and Astrophysics
Astronomy
45
Aluminum 26, Gamma Ray Astronomy, Interstellar Chemistry, Metallicity, Novae, Nuclear Fusion, Allende Meteorite, Aluminum 27, Angular Distribution, Astronomical Models, Heao 3, Interstellar Gas, Milky Way Galaxy
Scientific paper
The angular distribution and local concentration of interstellar Al-26 are calculated for five theoretical models of its origin, as a guide for future observations. The models considered relate Al-26 to current star formation (with surface CO density as its indicator), treat Al-26 as a secondary-nucleosynthesis product on seed nuclei with the same metallicity gradient as O, assume the Al-26 ejection rate is proportional to present light output, make Al-26 synthesis depend on total H I + H2 gas density, or assume that Al-26 is formed mainly in novae. The local decay and production rates for the five models are found to lie within a factor of 2 of surface density 0.0003/sq cm s, corresponding to a present (Al-26)/(Al-27) ratio of 5 x 10 to the -6th averaged over H I and H2 phases.
Clayton Donald D.
Leising Mark D.
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