Schedule Sat Feb 4 16:45:24 PST 2006
TBA
Ko Nakamura (Tokyo)

Supernova (SN) ejecta can be accelerated to attain relativistic speed by energetic explosion. Spherically symmetric 1-dimensional simulations show that the energy distribution of particles in SN ejecta follows a power law (Fields et al. 2002, Nakamura & Shigeyama 2004). 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. We also investigate the hydrodynamical interaction between accelerated ejecta and circumstellar matter comparing with a self-similar solution obtained for spherical explosion.

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