Type Ic Supernovae as Sources of Cosmic Rays

Details Type Ic Supernovae as Sources of Cosmic Rays Type Ic Supernovae as Sources of Cosmic Rays

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...1e..35n&link_type=abstract

Cosmic Particle Acceleration, 26th meeting of the IAU, Joint Discussion 1, 16-17 August, 2006, Prague, Czech Republic, JD01, #35

Computer Science

Scientific paper

Type Ic supernovae (SNe Ic), which may be associated with at least some gamma-ray bursts, seem to be the explosion of compact C-O stars such as Wolf-Rayet stars. Because of its compactness SN Ic can accelerate the outermost layers to relativistic speed by energetic explosion. The ejecta composed of carbon and oxygen could produce the light elements lithium, beryllium, and boron through the direct interaction with the ambient material if they are accelerated to energies above the threshold for spallation reactions. Some authors have estimated the yields of light elements (Fields et al. 2002, Nakamura & Shigeyama 2004, Nakamura et al. 2006) based on spherically symmetric 1-dimensional simulations of SN explosions, which show that energy distributions of accelerated ejecta follow a simple power law. However, energetic SNe are suggested to be associated with aspherical explosions. To investigate effects of asphericity, we have constructed a 2-dimensional relativistic hydrodynamic code using Piecewise Parabolic Method. Axi-symmetric explosion is initiated by inserting kinetic energy biased in the polar direction. We find that the energy distribution of matter accelerated by aspherical explosion does not follow a simple power law.

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