118 citations · 299 across the 33 of their papers we have counts for
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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…
Isolated Black Holes as Potential PeVatrons and Ultrahigh-energy Gamma-ray Sources
Shigeo S. Kimura, Kengo Tomida, Masato I. N. Kobayashi +2
The origin of PeV cosmic rays is a long-standing mystery, and ultrahigh-energy gamma-ray observations would play a crucial role in identifying it. Recently, LHAASO reported the dis…
Weakness of X-rays and Variability in High-redshift AGNs with Super-Eddington Accretion
Kohei Inayoshi, Shigeo S. Kimura, Hirofumi Noda
The James Webb Space Telescope (JWST) observations enable the exploration of active galactic nuclei (AGNs) with broad-line emission in the early universe. Despite their clear radia…
High-energy gamma-ray and neutrino emissions from interacting supernovae based on radiation hydrodynamic simulations: a case of SN 2023ixf
Shigeo S. Kimura, Takashi J. Moriya
Recent observations of core-collapse supernovae revealed that the existence of dense circumstellar matter (CSM) around their progenitors is ubiquitous. Interaction of supernova eje…
High-energy neutrino signatures from pulsar remnants of binary neutron-star mergers: coincident detection prospects with gravitational waves
Mainak Mukhopadhyay, Shigeo S. Kimura, Brian D. Metzger
Binary neutron-star (BNS) mergers are accompanied by multi-messenger emissions, including gravitational wave (GW), neutrino, and electromagnetic signals. Some fraction of BNS merge…
Ultrahigh-energy neutrino searches using next-generation gravitational wave detectors at radio neutrino detectors: GRAND, IceCube-Gen2 Radio, and RNO-G
Mainak Mukhopadhyay, Kumiko Kotera, Stephanie Wissel +2
Binary neutron star (BNS) mergers can be sources of ultrahigh-energy (UHE) cosmic rays and potential emitters of UHE neutrinos. The upcoming and current radio neutrino detectors li…