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SPI observations of the diffuse 60Fe emission in the Galaxy
W. Wang, M. J. Harris, R. Diehl +12
Gamma-ray line emission from radioactive decay of 60Fe provides constraints on nucleosynthesis in massive stars and supernovae. The spectrometer SPI on board INTEGRAL has accumulat…
511 keV line from millisecond pulsars in the Galactic center
Wei Wang
Observations of a strong and extended positron-electron annihilation line emission in the Galactic center (GC) region by the SPI/INTEGRAL are challenging to the existing models of…
Radioactive 26Al and massive stars in the Galaxy
Roland Diehl, Hubert Halloin, Karsten Kretschmer +13
Gamma-rays from radioactive 26Al (half life ~7.2 10^5 yr) provide a 'snapshot' view of ongoing nucleosynthesis in the Galaxy. The Galaxy is relatively transparent to such gamma-ray…
26Al in the inner Galaxy
R. Diehl, H. Halloin, K. Kretschmer +12
We performed a spectroscopic study of the 1809 keV gamma-ray line from 26Al decay in the Galaxy using the SPI imaging spectrometer with its high-resolution Ge detector camera on th…