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Detection of extended X-ray emission around the PeVatron microquasar V4641 Sgr with XRISM
Hiromasa Suzuki, Naomi Tsuji, Yoshiaki Kanemaru +26
A recent report on the detection of very-high-energy gamma rays from V4641 Sagittarii (V4641 Sgr) up to ~0.8 peta-electronvolt has made it the second confirmed "PeVatron" microquas…
Multi-wavelength Emission from Jets and Magnetically Arrested Disks in Nearby Radio Galaxies: Application to M87
Riku Kuze, Shigeo S. Kimura, Kenji Toma
Radio galaxies are a subclass of active galactic nuclei that drive relativistic jets from their center and are observed in radio to very-high-energy gamma rays. The emission mechan…
Inertial range of magnetorotational turbulence
Yohei Kawazura, Shigeo S. Kimura
Accretion disks around compact stars are formed due to turbulence driven by magnetorotational instability. Despite over thirty years of numerous computational studies on magnetorot…
High-energy neutrinos from late-time jets of gamma-ray bursts seeded with cocoon photons
Riki Matsui, Shigeo S Kimura, Hamid Hamidani
In gamma-ray bursts (GRBs), 100 - 1000 s after the prompt emission, afterglow observations have consistently shown X-ray excesses detected in the form of flares (XFs; in lon…