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15 papers · 1 filter
Actinide-boosting r Process in Black Hole-Neutron Star Merger Ejecta
Shinya Wanajo, Sho Fujibayashi, Kota Hayashi +3
We examine nucleosynthesis in the ejecta of black hole-neutron star mergers based on the results of long-term neutrino-radiation-magnetohydrodynamics simulations for the first time…
Revisiting Tests of Lorentz Invariance with Gamma-ray Bursts: Effects of Intrinsic Lags
Valeri Vardanyan, Volodymyr Takhistov, Metin Ata +1
Due to their cosmological distances high-energy astrophysical sources allow for unprecedented tests of fundamental physics. Gamma-ray bursts (GRBs) comprise among the most sensitiv…
Flare Duty Cycle of Gamma-Ray Blazars and Implications for High-Energy Neutrino Emission
Kenji Yoshida, Maria Petropoulou, Kohta Murase +1
Gamma-ray flares of blazars may be accompanied by high-energy neutrinos due to interactions of high-energy cosmic rays in the jet with photons, as suggested by the detection of the…
Improving efficiency of the path optimization method for a gauge theory
Yusuke Namekawa, Kouji Kashiwa, Hidefumi Matsuda +2
We investigate efficiency of a gauge-covariant neural network and an approximation of the Jacobian in optimizing the complexified integration path toward evading the sign problem i…
High-energy neutrinos from choked-jet supernovae: Searches and implications
Po-Wen Chang, Bei Zhou, Kohta Murase +1
The origin of the high-energy astrophysical neutrinos discovered by IceCube remains largely unknown. Multimessenger studies have indicated that the majority of these neutrinos come…
A Monte-Carlo based relativistic radiation hydrodynamics code with a higher-order scheme
Kyohei Kawaguchi, Sho Fujibayashi, Masaru Shibata
We develop a new relativistic radiation hydrodynamics code based on the Monte-Carlo algorithm. In this code, we implement a new scheme to achieve the second-order accuracy in time…