Other
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aps..aprh11007d&link_type=abstract
American Physical Society, APS April Meeting, April 14-17, 2007, abstract #H11.007
Other
Scientific paper
Four mission years of INTEGRAL have led to discoveries of new sources and to detailed astronomical refinements of already-known gamma-ray line emission. Recent massive-star nucleosynthesis is traced throughout the Galaxy with radioactivites seen in ^26Al and now also ^60Fe gamma-rays. Precision line spectroscopy reveals Doppler shifts for the ^26Al line, separately for different parts of the Galaxy. This provides new insights into the dynamics of hot interstellar gas, especially in inner-Galaxy regions which are otherwise difficult to observe. The processes generating new atomic nuclei in stars and supernovae are reflected in the abundances of these ejected radioactivities. We will discuss the recent spectroscopic information on these gamma-ray lines and their broader implications, in terms of massive-star nucleosynthesis models and Galactic massive-star content with its nucleosynthesis activity.
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