256 citations · 2.5k across the 78 of their papers we have counts for
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Luminous supernova-like UV/optical/infrared transients associated with ultra-long gamma-ray bursts from metal-poor blue supergiants
Kazumi Kashiyama, Daisuke Nakauchi, Yudai Suwa +2
Metal-poor massive stars may typically end up their lives as blue supergiants (BSGs). Gamma-ray bursts (GRBs) from such progenitors could have ultra-long duration of relativistic j…
High-energy neutrino and gamma-ray transients from trans-relativistic supernova shock breakouts
Kazumi Kashiyama, Kohta Murase, Shunsaku Horiuchi +2
Relativistic shocks that accompany supernovae (SNe) produce X-ray burst emissions as they break out in the dense circumstellar medium around the progenitors. This phenomenon is som…
Enhanced exploration for primordial black holes using pulsar timing arrays
Kazumi. Kashiyama, Naoki. Seto
We investigate the capability of pulsar timing arrays (PTAs) as a probe of primordial black holes (PBHs), which might constitute the Galactic dark matter. A PBH passing nearby the…
Long Duration X-Ray Flash and X-Ray Rich Gamma Ray Burst from Low Mass Population III Star
Daisuke Nakauchi, Yudai Suwa, Takanori Sakamoto +2
Recent numerical simulations suggest that Population III (Pop III) stars were born with masses not larger than but typically . By self-consis…