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Probing Cosmic-Ray Ion Acceleration with Radio-Submm and Gamma-Ray Emission from Interaction-Powered Supernovae
Kohta Murase, Todd A. Thompson, Eran O. Ofek
The optical and near-IR emission from some classes of supernovae (SNe), including Type IIn and possibly some super-luminous SNe, is likely powered by a collision between the SN eje…
Testing the Newborn Pulsar Origin of Ultrahigh Energy Cosmic Rays with EeV Neutrinos
Ke Fang, Kumiko Kotera, Kohta Murase +1
Fast-spinning newborn pulsars are intriguing candidate sources of ultrahigh energy cosmic rays (UHECRs). The acceleration of particles with a given composition in a fraction of the…
How Long does a Burst Burst?
Bin-Bin Zhang, Bing Zhang, Kohta Murase +2
Several gamma-ray bursts (GRBs) last much longer (~hours) in gamma-rays than typical long GRBs (~ minutes), and recently it was proposed that these "ultra-long GRBs" may form a dis…
Probing the Galactic Origin of the IceCube Excess with Gamma-Rays
Markus Ahlers, Kohta Murase
The IceCube Collaboration has recently reported evidence for a high-energy extraterrestrial neutrino flux. During two years of operation 28 events with energies between 30 TeV and…
Demystifying the PeV Cascades in IceCube: Less (Energy) is More (Events)
Ranjan Laha, John F. Beacom, Basudeb Dasgupta +2
The IceCube neutrino observatory has detected two cascade events with energies near 1 PeV. Without invoking new physics, we analyze the source of these neutrinos. We show that atmo…
Disentangling Hadronic and Leptonic Cascade Scenarios from the Very-High-Energy Gamma-Ray Emission of Distant Hard-Spectrum Blazars
Hajime Takami, Kohta Murase, Charles D. Dermer
Recent data from the \emph{Fermi} Large Area Telescope have revealed about a dozen distant hard-spectrum blazars that have very-high-energy (VHE; GeV) photons associa…