Fast time variations of supernova neutrino fluxes and their detectability

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.063007· OSTI ID:21432985

Lund, Tina ^[1]; Marek, Andreas; Janka, Hans-Thomas ^[2]; Lunardini, Cecilia ^[3]; Raffelt, Georg ^[4]

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1. Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C (Denmark)
2. Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Str. 1, 85748 Garching (Germany)
3. Arizona State University, Tempe, Arizona 85287-1504 (United States)
4. Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), Foehringer Ring 6, 80805 Muenchen (Germany)

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 {approx}1000 ms{sup -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.

• OSTI ID: 21432985
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevD.82.063007; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMPLITUDES
AXIAL SYMMETRY
CHERENKOV COUNTERS
EXPLOSIONS
INSTABILITY
NEUTRINO DETECTION
NEUTRINOS
NOISE
SIMULATION
SUPERNOVAE
WATER
BINARY STARS
DETECTION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
HYDROGEN COMPOUNDS
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
OXYGEN COMPOUNDS
RADIATION DETECTION
RADIATION DETECTORS
STARS
SYMMETRY
VARIABLE STARS