# Cobalt-56 γ-ray emission lines from the type Ia supernova 2014J

@article{Churazov2014Cobalt56E,
title={Cobalt-56 $\gamma$-ray emission lines from the type Ia supernova 2014J},
author={E. Churazov and R. Sunyaev and J. Isern and J. Kn{\"o}dlseder and P. Jean and F. Lebrun and N. Chugai and S. Grebenev and E. Bravo and S. Sazonov and M. Renaud},
journal={Nature},
year={2014},
volume={512},
pages={406-408}
}
A type Ia supernova is thought to be a thermonuclear explosion of either a single carbon–oxygen white dwarf or a pair of merging white dwarfs. The explosion fuses a large amount of radioactive 56Ni (refs 1–3). After the explosion, the decay chain from 56Ni to 56Co to 56Fe generates γ-ray photons, which are reprocessed in the expanding ejecta and give rise to powerful optical emission. Here we report the detection of 56Co lines at energies of 847 and 1,238 kiloelectronvolts and a γ-ray continuum… Expand
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