PeV neutrinos from wind breakouts of type Ⅱ supernovae

作者：Zhuo Li^*

来源：Science China Physics,Mechanics & Astronomy, 2019, 62(05): 118-124.

Recently,rapid multiwavelength photometry and flash spectra of supernova(SN)2013fs imply that the progenitor stars of regular type Ⅱ supernovae(SNe Ⅱ)may be commonly surrounded by a confined,dense stellar wind ejected from the progenitor star at a large mass loss rate over few years before the SNe.Based on the assumption that the pre-SN progenitor stars of SNe Ⅱ emit wind similar to SN 2013fs,with a mass loss rate■,we investigated neutrino emissions during the wind breakouts of SN shocks.We find that a typical SNe Ⅱ can convert～10-3of their bulk kinetic energy into neutrino emissions,contributing a significant fraction of the IceCube-detected neutrino flux at ■300 TeV.Moreover,■200 TeV IceCube neutrinos can be accounted for by the cosmic rays produced by shocks of all SN remnants,losing energy in their host galaxies,i.e.,the starburst galaxies.The future follow-up observations of high energy neutrinos and gamma-rays from nearby individual SNe Ⅱ,days to weeks after the explosions,will test this model.

• 单位
  北京大学