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

Sunyaev, R.; Sazonov, S.; Churazov, E. +8 more

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 a…