| Issue |
A&A
Volume 378, Number 3, November II 2001
|
|
|---|---|---|
| Page(s) | L49 - L52 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20011273 | |
| Published online | 15 November 2001 | |
Extragalactic neutrino background from very young pulsars surrounded by supernova envelopes
Department of Experimental Physics, University of Lódz, 90-236 Lódz, ul. Pomorska 149/153, Poland
Received:
15
August
2001
Accepted:
10
September
2001
We estimate the extragalactic muon neutrino background which is produced
by hadrons injected by very young pulsars at an early
phase after supernova explosion. It is assumed that hadrons are accelerated
in the pulsar wind zone which is filled with thermal photons captured below
the expanding supernova envelope. In collisions with those thermal photons
hadrons produce pions which decay into muon neutrinos.
At a later time, muon neutrinos are also produced by the hadrons in
collisions with matter of the expanding envelope. We show that extragalactic
neutrino background predicted by such a model should be detectable
by the planned 1 km2 neutrino detector if a significant part of pulsars
is born with periods shorter than ~
ms. Since such population of
pulsars is postulated by the recent models of production of
extremely high energy cosmic rays, detection of neutrinos with predicted
fluxes can be used as their observational test.
Key words: neutrinos / supernovae: general / pulsars: general / radiation mechanisms: non-thermal / cosmic rays
© ESO, 2001
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