Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..232..129p&link_type=abstract
IN: Gamma-ray line astrophysics; Proceedings of the International Symposium, Paris, France, Dec. 10-13, 1990 (A92-43619 18-90).
Astronomy and Astrophysics
Astrophysics
35
Aluminum 26, Massive Stars, Milky Way Galaxy, Radioactive Isotopes, Balloon-Borne Instruments, Emission Spectra, Galactic Structure, Gamma Ray Spectra, Nuclear Fusion, Spatial Distribution
Scientific paper
The various sources of production of Al-26 in the Galaxy are discussed, in the light of recent observational and theoretical data. It is found that with current stellar and nucleosynthesis models, all the candidate sources still fall short from producing the 3 solar masses/10 exp 6 y required by the observations. The corresponding flux distribution in the galactic plane is also discussed; contrary to previous claims, it is argued that this signature cannot easily help to discriminate between the various candidate sources. Possibilities of unambiguous identification of massive stars are discussed, and relevant flux profiles taking into account the spiral structure of the Galaxy are presented.
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