Gamma rays from Type Ia supernova SN 2014j

摘要: The whole set of INTEGRAL observations Type Ia supernova SN 2014J, covering the period 19–162 days after explosion, has been analyzed. For spectral fitting data are split into early and late periods 19–35 50–162, respectively, optimized for 56 Ni Co lines. As expected period, much gamma-ray signal is confined to energies below ∼200 keV, while it strongest above 400 keV. In particular, in lines at 847 1248 keV detected 4.7σ 4.3σ, respectively. light curves several representative energy bands calculated entire period. resulting spectra compared with a subset models. We confirm our previous finding that broadly consistent expectations canonical one-dimensional models, such as delayed detonation or deflagration models near-Chandrasekhar mass white dwarf. Late optical (day 136 explosion) show rather symmetric Fe line profiles, suggesting that, unless viewing angle special, distribution radioactive elements ejecta.