Fast time variations of supernova neutrino fluxes and their detectability

Tina Lund, Andreas Marek, Cecilia Lunardini, Hans Thomas Janka, Georg Raffelt

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

In the delayed explosion scenario of core-collapse supernovae, the accretion phase shows pronounced convective overturns and a low-multipole hydrodynamic instability, the standing accretion shock instability. These effects imprint detectable fast time variations on the emerging neutrino flux. Among existing detectors, IceCube is best suited to this task, providing an event rate of ∼1000ms-1 during the accretion phase for a fiducial SN distance of 10 kpc, comparable to what could be achieved with a megaton water Cherenkov detector. If the standing accretion shock instability activity lasts for several hundred ms, a Fourier component with an amplitude of 1% of the average signal clearly sticks out from the shot noise. We analyze in detail the output of axially symmetric hydrodynamical simulations that predict much larger amplitudes up to frequencies of a few hundred Hz. If these models are roughly representative for realistic SNe, fast time variations of the neutrino signal are easily detectable in IceCube or future megaton-class instruments. We also discuss the information that could be deduced from such a measurement about the physics in the SN core and the explosion mechanism of the SN.

Original languageEnglish (US)
Article number063007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Issue number6
DOIs
StatePublished - Sep 21 2010

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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