Abstract
The allsky image of 26Al radiation at 1.809 MeV with COMPTEL suggests that clusters of massive stars dominate the Galactic production of 26Al. Studies of rather well-known localized regions are most promising to further this interpretation. In the Vela region, excessive emissivity is found compared to other Galactic regions. This may be due to few prominent foreground sources, such as the Vela SNR and RX J0852.0-4622 combined; but more plausibly the star forming activity along the Vela Molecular Ridge is enhanced in general, too. In the anticenter region, the detected 26Al emission appears related to nucleosynthetic activity in the Orion OB1 association: It seems plausible that ejecta are being vented into the Eridanus bubble blown by earlier massive stars’ activity.
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