High-energy Cosmic Rays and Neutrinos from Semi-relativistic Hypernovae

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dc.creatorWang, Xiang-Yu
dc.creatorRazzaque, Soebur
dc.creatorMeszaros, Peter
dc.creatorDai, Zi-Gao
dc.date2007-05-01
dc.date2007-09-12
dc.date.accessioned2026-07-07T12:13:28Z
dc.date.available2026-07-07T12:13:28Z
dc.descriptionThe origin of the ultrahigh-energy (UHE) cosmic rays (CRs) from the second knee ($\sim6\times10^{17}$eV) above in the CR spectrum is still unknown. Recently, there has been growing evidence that a peculiar type of supernovae, called hypernovae, are associated with sub-energetic gamma-ray bursts (GRBs), such as SN1998bw/GRB980425 and SN2003lw/GRB031203. Such hypernovae appear to have high (up to mildly relativistic) velocity ejecta, which may be linked to the sub-energetic GRBs. Assuming a continuous distribution of the kinetic energy of the hypernova ejecta as a function of its velocity $E_k\propto (Γβ)^{-α}$ with $α\sim 2$, we find that 1) the external shock wave produced by the high velocity ejecta of a hypernova can accelerate protons up to energies as high as $10^{19} {\rm eV}$; 2) the cosmological hypernova rate is sufficient to account for the energy flux above the second knee; and 3) the steeper spectrum of CRs at these energies can arise in these sources. In addition, hypernovae would also give rise to a faint diffuse UHE neutrino flux, due to $pγ$ interactions of the UHE CRs with hypernova optical-UV photons.
dc.descriptionAccepted for publication in Phys. Rev. D, 6 revtex pages, 1 figure
dc.identifierhttps://arxiv.org/abs/0705.0027
dc.identifierhttp://arxiv.org/abs/0705.0027
dc.identifierPhys.Rev.D76:083009,2007
dc.identifierdoi:10.1103/PhysRevD.76.083009
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210856
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleHigh-energy Cosmic Rays and Neutrinos from Semi-relativistic Hypernovae
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