Supernovae double-peaked light curves from double-nickel distribution

Understand

Among supernovae (SNe) of different luminosities, many double-peaked light curves (LCs) have been observed, representing a broad morphological variety.

• In this work, we investigate which of these can be modelled by assuming a double-peaked distribution of their radioactive material, as originally proposed for SN2005bf.
• The inner zone corresponds to the regular explosive nucleosynthesis and extends outwards, according to the usual scenario of mixing.
• The outer 56Ni-rich shell may be related to the effect of jet-like outflows that have interacted with more distant portions of the star before the arrival of the SN shock.