Neutrino oscillations in supernovae: Angular moments and fast instabilities

Lucas Johns, Hiroki Nagakura, George M. Fuller, Adam Burrows

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Recent theoretical work indicates that the neutrino radiation in core-collapse supernovae may be susceptible to flavor instabilities that set in far behind the shock, grow extremely rapidly, and have the potential to profoundly affect supernova dynamics and composition. Here we analyze the nonlinear collective oscillations that are prefigured by these instabilities. We demonstrate that a zero crossing in nνe-nνe as a function of propagation angle is not sufficient to generate instability. Our analysis accounts for this fact and allows us to formulate complementary criteria. Using fornax simulation data, we show that fast collective oscillations qualitatively depend on how forward peaked the neutrino angular distributions are.

Original languageEnglish (US)
Article number043009
JournalPhysical Review D
Volume101
Issue number4
DOIs
StatePublished - Feb 15 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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