Radioactive 26Al from massive stars in the Galaxy

  title={Radioactive 26Al from massive stars in the Galaxy},
  author={Roland Diehl and Hubert Halloin and Karsten Kretschmer and Giselher G. Lichti and Volker Sch{\"o}nfelder and A. W. Strong and A. von Kienlin and Wei Wang and P. Jean and J{\"u}rgen Kn{\"o}dlseder and Jean Pierre Roques and Georg Weidenspointner and Stéphane Schanne and Dieter H. Hartmann and C. Winkler and Cornelia B. Wunderer},
Gamma-rays from radioactive 26Al (half-life ∼7.2 × 105 years) provide a ‘snapshot’ view of continuing nucleosynthesis in the Galaxy. The Galaxy is relatively transparent to such γ-rays, and emission has been found concentrated along its plane. This led to the conclusion that massive stars throughout the Galaxy dominate the production of 26Al. On the other hand, meteoritic data show evidence for locally produced 26Al, perhaps from spallation reactions in the protosolar disk. Furthermore… Expand
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