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
The Cosmic $\gamma$-ray Background (CGB) in the MeV regime remains among the least understood components of diffuse cosmic radiation, primarily due to instrumental limitations in detecting faint isotropic emission at MeV energies. We present an indirect method for probing isotropic emission from soft X-rays to $\gamma$...
Dimitris Tsatsis, T. Siegert, V. Savchenko et al.· 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
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