Neutrino signal of electron-capture supernovae from core collapse to cooling

Phys Rev Lett. 2010 Jun 25;104(25):251101. doi: 10.1103/PhysRevLett.104.251101. Epub 2010 Jun 22.

Abstract

An 8.8M{⊙} electron-capture supernova was simulated in spherical symmetry consistently from collapse through explosion to essentially complete deleptonization of the forming neutron star. The evolution time (∼9 s) is short because high-density effects suppress our neutrino opacities. After a short phase of accretion-enhanced luminosities (∼200 ms), luminosity equipartition among all species becomes almost perfect and the spectra of ν{e} and ν{μ,τ} very similar, ruling out the neutrino-driven wind as r-process site. We also discuss consequences for neutrino flavor oscillations.