The radioactive isotope is believed to be mainly produced by massive stars and ejected into the interstellar medium through their winds and supernovae. Due to its lifetime of 1.04,Myr, it traces recent nucleosynthesis and star formation. The isotope Al 26 Fe 60 is similarly long-lived, with a lifetime of 3.8,Myr, and o...
Manja L. Zimmerer, T. Siegert, Niklas C. Bauer et al.· Astronomy & Astrophysics· 0 citations
Galactic cosmic rays (GCRs) are thought to originate from shock acceleration in supernova remnants, but interstellar ionization rates suggest an additional low-energy cosmic-ray (LECR) component. LECRs excite nuclei in the ISM, producing MeV gamma-ray line emission through subsequent de-excitation. Observations of this...
T. Oka, T. Siegert, T. Bouchet et al.· 0 citations
Galactic cosmic rays (GCRs) are commonly thought to originate from shock acceleration in supernova remnants. Observations of ionization rates in the interstellar medium (ISM) have indicated an excess of low-energy CRs (LECRs) beyond that expected from standard propagation models. The LECRs excite nuclei in the ISM, pro...
T. Oka, T. Siegert, T. Bouchet et al.· Astronomy & Astrophysics· 0 citations
The decay of dark matter (DM) is a generic prediction of many particle physics models, producing distinctive monochromatic signatures in environments such as the Galactic halo. Searches for decaying DM in the elusive'MeV gap'have remained conspicuously under-explored, despite well-motivated models including axion-like...
Robin Anthony-Petersen, O. Ning, Yuta Watanabe et al.· 0 citations
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