Gamma rays and neutrinos from supernovae of type Ib and Ic with late time emission

Abstract

Observations of some supernovae (SNe), such as SN 2014C, in the x-ray and radio wavebands revealed a rebrightening over a timescale of about a year since their detection. Such a discovery hints towards the evolution of a hydrogen-poor SN of type Ib/Ic into a hydrogen-rich SN of type IIn, the late time activity being attributed to the interaction of the SN ejecta with a dense hydrogen-rich circumstellar medium (CSM) far away from the stellar core. We compute the neutrino and γ-ray emission from these SNe, considering interactions between the shock accelerated protons and the nonrelativistic CSM protons. Assuming three CSM models inspired by recent electromagnetic observations, we explore the ..