Neutrino Signal of Electron-Capture Supernovae from Core Collapse to Cooling

An 8: 8M(circle dot) 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 (similar to 9 s) is short because high-density effects suppress our neutrino opacities. After a short phase of accretion-enhanced luminosities (similar to 200 ms), luminosity equipartition among all species becomes almost perfect and the spectra of (nu) over bar (e) and (nu) over bar (mu,tau) very similar, ruling out the neutrino-driven wind as r-process site. We also discuss consequences for neutrino flavor oscillations.