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Optical Synchrotron Precursors of Radio Hypernovae
Daisuke Nakauchi, Kazumi Kashiyama, Hiroki Nagakura +2
We examine the bright radio synchrotron counterparts of low-luminosity gamma-ray bursts (llGRBs) and relativistic supernovae (SNe) and find that they can be powered by spherical hy…
Three-dimensional Boltzmann-Hydro code for core-collapse in massive stars I. special relativistic treatments
Hiroki Nagakura, Kohsuke Sumiyoshi, Shoichi Yamada
We propose a novel numerical method for solving multi-dimensional, special relativistic Boltzmann equations for neutrinos coupled to hydrodynamics equations. It is meant to be appl…
Critical Surface for Explosions of Rotational Core-Collapse Supernovae
Wakana Iwakami, Hiroki Nagakura, Shoichi Yamada
The effect of rotation on the explosion of core-collapse supernovae is investigated systematically in three-dimensional simulations. In order to obtain the critical conditions for…
Jet collimation in the ejecta of double neutron star merger: new canonical picture of short gamma-ray bursts
Hiroki Nagakura, Kenta Hotokezaka, Yuichiro Sekiguchi +2
The observations of jet breaks in the afterglows of short gamma-ray bursts (SGRBs) indicate that the jet has a small opening angle of < 10°. The collimation mechanism of the jet is…