Non-thermal neutrinos from supernovae leaving a magnetar

作者：Horiuchi Shunsaku^*; Suwa Yudai; Takami Hajime; Ando Shin'ichiro; Sato Katsuhiko

来源：Monthly Notices of the Royal Astronomical Society, 2008, 391(4): 1893-1899.

DOI：10.1111/j.1365-2966.2008.14000.x

• acceleration of particles
• neutrinos
• stars: magnetic fields
• pulsars: general
• supernovae: general

Under the fossil field hypothesis of the origin of magnetar magnetic fields, the magnetar inherits its magnetic field from its progenitor. We show that during the supernova of such a progenitor, protons may be accelerated to similar to 10(4) GeV as the supernova shock propagates in the stellar envelope. Inelastic nuclear collisions of these protons produce a flash of high-energy neutrinos arriving a few hours after thermal (10 MeV)neutrinos. The neutrino flash is characterized by energies up to O(100) GeV and durations seconds to hours, depending on the progenitor: those from smaller Type Ibc progenitors are typically shorter in duration and reach higher energies compared to those from larger Type II progenitors. A Galactic Type Ib supernova leaving behind a magnetar remnant will yield up to similar to 160 neutrino-induced muon events in Super-Kamiokande, and up to similar to 7000 in a km(3) class detector such as IceCube, providing a means of probing supernova models and the presence of strong magnetic fields in the stellar envelope.

• 出版日期2008-12-21