---
abstract: 'Starburst regions with multiple powerful winds of young massive stars and supernova remnants (SNRs) are favorable sites for high-energy cosmic ray (CR) acceleration. A supernova (SN) shock colliding with a fast wind from a compact cluster of young stars allows the acceleration of protons to energies well above the standard limits of diffusive shock acceleration in an isolated SN. The proton spectrum in such a wind-SN [pevatron]{} accelerator is hard with a large flux in the high-energy-end of the spectrum producing copious [$\gamma$-rays]{} and neutrinos in inelastic nuclear collisions. We argue that SN shocks in the Westerlund 1 () cluster in the Milky Way may accelerate protons to $\gsim 40$PeV. Once accelerated, these CRs will diffuse into surrounding dense clouds and produce neutrinos with fluxes sufficient to explain a fraction of the events detected by IceCube from the inner Galaxy.'
author:
- |
    A.M.Bykov$^{1,2}$[^1], D.C.Ellison$^{3}$[^2], P.E.Gladilin$^{1}$[^3] and S.M.Osipov$^{1}$[^4]\
    $^{1}$Ioffe Institute of the Russian Academy of Sciences, Saint-Petersburg, Russia,\
    $^{2}$Saint-Petersburg State Polytechnical University, Saint-Petersburg, Russia,\
    $^{3}$North Carolina State University, Department of Physics, Raleigh, NC 27695-8202, USA
bibliography:
- 'Biblio\_mn.bib'
title: Ultrahard spectra of PeV neutrinos from supernovae in compact star clusters
---

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neutrinos — acceleration of particles — 