Other
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1000..409n&link_type=abstract
GAMMA-RAY BURSTS 2007: Proceedings of the Santa Fe Conference. AIP Conference Proceedings, Volume 1000, pp. 409-412 (2008).
Other
Gamma-Ray Sources, Gamma-Ray Bursts, Neutrino, Muon, Pion, And Other Elementary Particles, Cosmic Rays, Infall, Accretion, And Accretion Disks, Galactic Nuclei, Circumnuclear Matter, And Bulges
Scientific paper
I have developed two numerical code to investigate the central engine of long GRBs: One is a newtonian code with some micophysics, and the other is a General Relativistic MHD (GRMHD) code without microphysics. As for the newtonian code, neutrino heating processes and magnetic fields are included in the ZEUS code to investigate the collapsar model. It is found that neutrino heating processes are insufficient to launch a jet in this study. A Jet is launched by magnetic fields, although this jet is non-relativistic at present. Simulations of the order of 10 sec may be required to generate a powerful jet by special (general) relativistic MHD code. As for my GRMHD code, it has passed many test calculations. Now I am doing a preliminary simulation of a collapsar using my GRMHD code. In the future, I am planning to include some important microphysics into my GRMHD code and perform realistic simulations of collapsars.
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