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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…
Multiwavelength Probes of Cosmic Ray Transport in Molecular Cloud Structures
Hayden P. H. Ng, Ellis R. Owen, Naomi Tsuji +1
We investigate how cosmic ray (CR) transport in molecular clouds and their substructures can be probed using multi-wavelength observations. The detailed microphysics regulating the…
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…
Neutrinos as a new tool to characterise the Milky Way Centre
Paul C. W. Lai, Beatrice Crudele, Matteo Agostini +4
The Central Molecular Zone (CMZ), a star-forming region rich in molecular clouds located within hundreds of parsecs from the centre of our Galaxy, converts gas into stars less effi…
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 drive…
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…