ppt 高密度天体物理学 ントロダクション.ppt

Toward Understanding the Central Engine of Long GRBs Kyoto University, KIPAC S. Nagataki Collaborators § Introduction Some GRBs are Accompanied by Hypernovae Scenario of Normal Collapse-driven Supernovae Promising candidates for the energy scales (a) Gravitational Potential Energy (b) Rotation Energy of a Central BH § (a) Gravitational BindingEnergy (collapsar model) Progenitor: Model E25 in Heger et al. (2000) that is modified so that inner most core has collapsed to form a BH with 1.7Mo. 2-D Ideal MHD (r,q)=(150,30) is solved by ZEUS code. Initial rotation is same with MacFadyen and Woosley (1999). Realistic EOS (Blinnikov et al. 1996). Photo-disintegration (N, P, He, O, Ni). Newton　Gravity　（Including self gravity; MBH =1.7Mo）. Neutrino Cooling (Leakage scheme). Neutrino Heating (optically-thin limit). Magnetic Field　 （Vertical + Dipole field: ON?OFF）.　 Neutrino Processes (1) Neutrino Processes (2) Magnetic Fields § Resultｓ of collapsar model 　 Simulation with no B-Field Neutrino Heating Processes Energetics Simulations with Magnetic Fields Can the Jet be a GRB? § (b) Rotation Energy of a Central BH (BZ-Process Model) § Formulation of General Relativistic Magneto-Hydrodynamic Code (GRMHD Code) Fishbone and Moncrief’s Problem Fishbone and Moncrief’s Problem　（cont’d） § Discussion Effects of Neutrino Pair Annihilationwith General Relativity Propagation of GRB Jet Results of Explosive Nucleosynthesis including effects of Bi-polar explosion applied for SN1987A One of Our Predictions on GRBs in 2000. Observations of Line Profiles of Hypernovae Faint Hypernova? §Particle Acceleration and High Energy Phenomena in GRBｓ Particle in Cell Simulation High Energy Neutrino Emission from Gamma-Ray BurstK. Murase and S. N. PRD, ７３, ０６３００２　（２００６） Template of GRB Neutrinos in IceCube Collaboration § Summary Summary on the central engine of Long GRBs Numerical simulation of Blandford-Znajek Process 1-D Shock Tube Problems 2-D Shock Tube problem Cylindrical explosion