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Hard X-ray Properties of the Merging Cluster Abell 3667 as Observed with Suzaku
Kazuhiro Nakazawa, Craig L. Sarazin, Madoka Kawaharada +10
Wide-band Suzaku data on the merging cluster Abell 3667 were examined for hard X-ray emission in excess to the known thermal component. Suzaku detected X-ray signals in the wide en…
Origin of ultra-high energy cosmic rays in the era of Auger and Telescope Array
Susumu Inoue
The origin of ultra-high energy cosmic rays is discussed in light of the latest observational results from the Pierre Auger Observatory, highlighting potential astrophysical source…
Prompt High-Energy Emission from Proton-Dominated Gamma-Ray Bursts
Katsuaki Asano, Susumu Inoue, Peter Mészáros
The prompt emission of gamma-ray bursts (GRBs) is widely thought to be radiation from accelerated electrons, but an appreciably larger amount of energy could be carried by accelera…
Suzaku Observation of the Ophiuchus Galaxy Cluster: One of the Hottest Cool Core Clusters
Yutaka Fujita, Kiyoshi Hayashida, Masaaki Nagai +6
We present the analysis of a Suzaku observation of the Ophiuchus galaxy cluster. We confirmed that the cluster has a cool core. While the temperature of the intracluster medium (IC…
Detectability of Pair Echos from Gamma-Ray Bursts and Intergalactic Magnetic Fields
Keitaro Takahashi, Kohta Murase, Kiyotomo Ichiki +2
High-energy emission from gamma-ray bursts (GRBs) can give rise to pair echos, i.e. delayed inverse Compton emission from secondary pairs produced in interactions w…
Probing Intergalactic Magnetic Fields in the GLAST Era through Pair Echo Emission from TeV Blazars
Kohta Murase, Keitaro Takahashi, Susumu Inoue +2
More than a dozen blazars are known to be emitters of multi-TeV gamma rays, often with strong and rapid flaring activity. By interacting with photons of the cosmic microwave and in…