256 citations · 2.5k across the 78 of their papers we have counts for
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Soft X-ray Extended Emissions of Short Gamma-Ray Bursts as Electromagnetic Counterparts of Compact Binary Mergers; Possible Origin and Detectability
Takashi Nakamura, Kazumi Kashiyama, Daisuke Nakauchi +3
We investigate the possible origin of extended emissions (EEs) of short gamma-ray bursts with an isotropic energy of ~ 10^(50-51) erg and a duration of a few 10 s to ~ 100 s, based…
Cosmological Fast Radio Bursts from Binary White Dwarf Mergers
Kazumi Kashiyama, Kunihito Ioka, Peter Mészáros
Recently, Thornton et al. reported the detection of four fast radio bursts (FRBs). The dispersion measures indicate that the sources of these FRBs are at cosmological distance. Giv…
Blue Supergiant Model for Ultra-Long Gamma-Ray Burst with Superluminous-Supernova-Like Bump
Daisuke Nakauchi, Kazumi Kashiyama, Yudai Suwa +1
Long GRBs (LGRBs) have typical duration of ~ 30 s and some of them are associated with hypernovae, like Type Ic SN 1998bw. Wolf-Rayet stars are the most plausible LGRB progenitors,…
On the neutrino non-detection of GRB 130427A
Shan Gao, Kazumi Kashiyama, Peter Meszaros
The recent gamma-ray burst GRB 130427A has an isotropic electromagnetic energy erg, suggesting an ample supply of target photons for photo-hadronic interaction…
Sub-PeV Neutrinos from TeV Unidentified Sources in the Galaxy
D. B. Fox, K. Kashiyama, P. Meszaros
The IceCube collaboration discovery of 28 high-energy neutrinos over the energy range 30 TeV <~ E_nu <~ 1 PeV, a 4.3-sigma excess over expected backgrounds, represents the first hi…
Neutron-Proton-Converter Acceleration Mechanism at Subphotospheres of Relativistic Outflows
Kazumi Kashiyama, Kohta Murase, Peter Mészáros
We study a type of particle acceleration that operates via neutron-proton conversion in inelastic nuclear collisions. This mechanism can be expected for relativistic shocks at subp…
Subphotospheric Neutrinos from Gamma-Ray Bursts: The Role of Neutrons
Kohta Murase, Kazumi Kashiyama, Peter Meszaros
Relativistic outflows with neutrons inevitably lead to inelastic collisions, and resulting subphotospheric gamma rays may explain prompt emission of gamma-ray bursts. In this model…