Physics
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...297..194m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 297, Oct. 1, 1985, p. 194-198.
Physics
18
Cosmochemistry, Galactic Cosmic Rays, Supernovae, Acceleration (Physics), Aluminum 26, Aluminum 27, Interstellar Matter, Solar System
Scientific paper
The evidence for supernova activity in the solar neighborhood during the last few million years is reviewed, using astronomical data and measurements of cosmic-ray time variations. The available evidence suggests that the solar system is currently immersed inside an old superbubble. The 'local' production of Al-26 is estimated, and the gamma-ray line flux derived. On the basis of the calculations it appears feasible that the gamma-ray emission detected by Mahoney et al. may be of recent 'local' supernova origin. Significant galactic emission cannot be excluded, of course, but its existence appears less compelling. If a local origin were confirmed by further observations, it would imply that the high Al-26/Al-27 ratios found in some meteorite material would require a special scenario, such as 'supernova injection' during the formation of the solar system.
Hartquist Thomas W.
Morfill Gregor E.
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