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Searching for the Time Variation in Supernova Remnant RX J1713.7-3946
Aytap Sezer, Ryo Yamazaki, Xiaohong Cui +2
Supernova Remnant RX J1713.7-3946 emits synchrotron X-rays and very high energy -rays. Recently, thermal X-ray line emission is detected from ejecta plasma. CO and HI observatio…
Inverse Compton emission from a cosmic-ray precursor in RX J1713.7-3946
Yutaka Ohira, Ryo Yamazaki
Recently, the High Energy Stereoscopic System (H.E.S.S.) reported two new interesting results for a gamma-ray emitting supernova remnant, RX J1713.7-3946 (G347.3-0.5). The first re…
Weibel instability driven by spatially anisotropic density structures
Sara Tomita, Yutaka Ohira
Observations of afterglows of gamma-ray bursts suggest (GRBs) that post-shock magnetic fields are strongly amplified to about 100 times the shock-compressed value. The Weibel insta…
Injection to rapid diffusive shock acceleration at perpendicular shocks in partially ionized plasmas
Yutaka Ohira
We present a three-dimensional hybrid simulation of a collisionless perpendicular shock in a partially ionized plasma for the first time. In this simulation, the shock velocity and…
Suzaku observations of the hard X-ray spectrum of Vela Jr
Sawako Takeda, Aya Bamba, Yukikatsu Terada +5
We report the results of Suzaku observations of the young supernova remnant, Vela Jr.\ (RX J0852.04622), which is known to emit synchrotron X-rays, as well as TeV gamma-rays. Ut…
Spatially-Resolved Spectroscopy of a Balmer-Dominated Shock in the Cygnus Loop: An Extremely Thin Cosmic-Ray Precursor?
Satoru Katsuda, Keiichi Maeda, Yutaka Ohira +9
We present high-resolution long-slit spectroscopy of a Balmer-dominated shock in the northeastern limb of the Cygnus Loop with the Subaru high dispersion spectrograph. By setting t…
Electromagnetic Afterglows Associated with Gamma-Ray Emission Coincident with Binary Black Hole Merger Event GW150914
Ryo Yamazaki, Katsuaki Asano, Yutaka Ohira
The Fermi Gamma-ray Burst Monitor reported the possible detection of the gamma-ray counterpart of a binary black hole merger event, GW150914. We show that the gamma-ray emission is…