7 citations · 16 across the 14 of their papers we have counts for
13 papers · 1 filter
Locating the Production Sites of High-Energy Neutrinos in Blazar Jets
Rui Xue, Yoshiyuki Inoue, Ze-Rui Wang +2
The production sites of high-energy neutrinos in blazar jets remain poorly constrained. In this work, we investigate the physical conditions required for efficient neutrino product…
XRISM Time-resolved Fe K Spectroscopy of NGC 4395: Time-variable Inner-disk Emission
Taiki Kawamuro, Satoshi Yamada, Hirofumi Noda +3
We report the first XRISM observation of the low-mass AGN in the nearby dwarf galaxy NGC 4395 (), complemented by a simultaneous NuSTAR observation…
Revisiting Disk Winds in Active Galactic Nuclei as an Origin of Cosmic Gamma-ray and Neutrino Backgrounds
Nobuyuki Sakai, Yoshiyuki Inoue, Ellis R. Owen
The origin of the cosmic neutrino background (CNB) and the cosmic gamma-ray background (CGB) remains uncertain. Accretion disk winds driven by active galactic nuclei (AGNs) have be…
The 'Forgotten' Neutrons: Implications for the Propagation of High-Energy Cosmic Rays in Magnetized Astrophysical and Cosmological Structures
Ellis R. Owen, Kinwah Wu, Yoshiyuki Inoue +3
Cosmological filaments, galaxy clusters, and galaxies are magnetized reservoirs of cosmic rays (CRs). The exchange of CRs across these structures is usually modeled assuming that t…
Proton Acceleration by Collisionless Shocks in Supermassive Black Hole Coronae: Implications for High-Energy Neutrinos
Minh Nhat Ly, Yoshiyuki Inoue, Yasuhiko Sentoku +1
Recent observations by the IceCube Neutrino Observatory have revealed a significant excess of high-energy neutrinos from nearby Seyfert galaxies, such as NGC~1068, without a corres…
GeV-TeV Connections in Galaxies: Evolutionary Signatures from Pulsars in Globular Clusters
Ellis R. Owen, Yoshiyuki Inoue, Chung-Yue Hui +2
The dominant mechanisms underlying high-energy -ray emission from galaxies vary by galaxy type. In starbursts, a major contribution comes from neutral pion decay. This is driven…
The Moon as a Cosmic-Ray Spectrometer: Prospects for MeV Gamma-Ray Observations
Tatsuki Fujiwara, Ellis R. Owen, Yoshiyuki Inoue +10
The Moon is the closest celestial gamma-ray emitting object. Its gamma-ray emission arises from interactions between Galactic cosmic rays (CRs) and the lunar surface. While the lun…
High energy extragalactic multimessenger backgrounds from starburst and dead galaxies
Ellis R. Owen, Yoshiyuki Inoue, Tatsuki Fujiwara +1
Starburst galaxies are -ray sources. Canonically, their emission is driven by hadronic cosmic rays (CRs) interacting with interstellar gas, forming -rays via the decay of neu…
Cosmic ray neutrons in magnetized astrophysical structures
Ellis R. Owen, Yoshiyuki Inoue, Tatsuki Fujiwara +2
Cosmic rays are often modeled as charged particles. This allows their non-ballistic propagation in magnetized structures to be captured. In certain situations, a neutral cosmic ray…
The Disk Wind Contribution to the Gamma-Ray emission from the nearby Seyfert Galaxy GRS 1734-292
Nobuyuki Sakai, Tomoya Yamada, Yoshiyuki Inoue +4
Radio-quiet Seyfert galaxies have been detected in GeV gamma-rays by the Large Area Telescope (LAT), but the origin of much of this emission is unclear. We consider the nea…
Energetic particles and high-energy processes in cosmological filaments and their astronomical implications
Kinwah Wu, Ellis R. Owen, Qin Han +2
Large-scale cosmic filaments connect galaxies, clusters and voids. They are permeated by magnetic fields with a variety of topologies. Cosmic rays with energies up to $10^{20}\;\!{…
Galactic transient sources with the Cherenkov Telescope Array Observatory
Cherenkov Telescope Array Observatory Consortium
A wide variety of Galactic sources show transient emission at soft and hard X-ray energies: low- and high-mass X-ray binaries containing compact objects, isolated neutron stars exh…
Deciphering Radio Emissions from Accretion Disk Winds in Radio-Quiet Active Galactic Nuclei
Tomoya Yamada, Nobuyuki Sakai, Yoshiyuki Inoue +1
Unraveling the origins of radio emissions from radio-quiet active galactic nuclei (RQ AGNs) remains a pivotal challenge in astrophysics. One potential source of this radiation is t…