Wednesday, July 17, 2013

1307.4190 (Roland Diehl et al.)

SPI Measurements of Nucleosynthesis Gamma-Rays    [PDF]

Roland Diehl, Frauke Alexander, Martin Krause, Daniel Lubos, Karsten Kretschmer, Pierrick Martin, Wei Wang
Studies based on the gamma-ray lines from radioactive decay of unstable isotopes produced in massive-star and supernova nucleosynthesis have been among INTEGRAL's prominent science achievements. 26Al has become a tool to study specific source regions, such as massive-star groups and associations in nearby regions which can be discriminated from the galactic-plane background, and the inner Galaxy where Doppler shifted lines add to the astronomical information. 60Fe is co-produced by the sources of 26Al, and the isotopic ratio from their nucleosynthesis encodes stellar-structure information. Here we summarize latest results using the accumulated multi-year database of observations, point to the relevant publications, and discuss their astrophysical implications.
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