902 citations · 3.2k across the 78 of their papers we have counts for
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Non-thermal Emissions from Cool Cores Heated by Cosmic-Rays in Galaxy Clusters
Yutaka Fujita, Yutaka Ohira
We study non-thermal emissions from cool cores in galaxy clusters. We adopted a recent model, in which cosmic-rays (CRs) prevail in the cores and stably heat them through CR stream…
Stable Heating of Cluster Cooling Flows by Cosmic-Ray Streaming
Yutaka Fujita, Yutaka Ohira
We study heating of cool cores in galaxy clusters by cosmic-ray (CR) streaming using numerical simulations. In this model, CRs are injected by the central active galactic nucleus (…
Escape of cosmic-ray electrons from supernova remnants
Yutaka Ohira, Ryo Yamazaki, Norita Kawanaka +1
We investigate escape of cosmic ray (CR) electrons from a supernova remnant (SNR) to interstellar space. We show that CR electrons escape in order from high energies to low energie…
Alfven Wave Amplification and Self-Containment of Cosmic-Rays Escaping from a Supernova Remnant
Yutaka Fujita, Fumio Takahara, Yutaka Ohira +1
We study the escape of cosmic-ray (CR) protons accelerated at a supernova remnant (SNR) by numerically solving a diffusion-convection equation from the vicinity of the shock front…
Gamma-Ray Burst without Baryonic and Magnetic Load?
Kunihito Ioka, Yutaka Ohira, Norita Kawanaka +1
We show that, contrary to common belief, internal shocks can arise in an accelerating radiation-dominated jet if it is confined even weakly to a converging opening angle because th…
Positron annihilation as a cosmic-ray probe
Yutaka Ohira, Kazunori Kohri, Norita Kawanaka
Recently, the gamma-ray telescopes AGILE and Fermi observed several middle-aged supernova remnants (SNRs) interacting with molecular clouds. A plausible emission mechanism of the g…