Radioactive Al-26 from massive stars - Production and distribution in the Galaxy

Details Radioactive Al-26 from massive stars - Production and distribution in the Galaxy Radioactive Al-26 from massive stars - Production and distribution in the Galaxy

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405l..55p&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 405, no. 2, p. L55-L58.

Astronomy and Astrophysics

Astrophysics

43

Aluminum 26, Massive Stars, Milky Way Galaxy, Nuclear Astrophysics, Angular Distribution, Emissivity, Gamma Ray Astronomy, Supernovae, Wolf-Rayet Stars

Scientific paper

Recent models of stellar nucleosynthesis suggest that massive stars are probably the main contributors of radioactive Al-26 in the Galaxy. In that case the angular distribution of the corresponding 1.8 MeV emission should trace, to some extent, the Galactic spiral arms, presumed site of massive star formation. Numerical simulations of the expected emissivity profile as a function of Galactic longitude are presented, taking into account plausible source distributions and a realistic spiral pattern for our Galaxy. The recently reported observations of the COMPTEL instrument aboard the Compton Observatory are discussed in light of those results.

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