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High Forbidden-to-resonance Line Ratio of OVII Discovered in the Cygnus Loop
H. Uchida, S. Katsuda, H. Tsunemi +5
Charge exchange (CX) is an important process in shock physics since it indicates an interaction between downstream ions and ambient neutral hydrogen, suggesting a presence of a col…
Evidence for Rapid Adiabatic Cooling as an Origin of the Recombining Plasma in the Supernova Remnant W49B Revealed by NuSTAR Observations
Hiroya Yamaguchi, Takaaki Tanaka, Daniel R. Wik +8
X-ray observations of supernova remnants (SNRs) in the last decade have shown that the presence of recombining plasmas is somewhat common in a certain type of object. The SNR W49B…
NuSTAR Detection of Nonthermal Bremsstrahlung from the Supernova Remnant W49B
Takaaki Tanaka, Hiroya Yamaguchi, Daniel R. Wik +10
We report on NuSTAR observations of the mixed morphology supernova remnant (SNR) W49B, focusing on its nonthermal emission. Whereas radio observations as well as recent gamma-ray o…
Suzaku X-ray observations of the mixed-morphology supernova remnant CTB 1
Miho Katsuragawa, Shinya Nakashima, Hideaki Matsumura +6
We present an X-ray study of the mixed-morphology supernova remnant CTB 1 (G116.9+0.2) observed with Suzaku. The 0.6-2.0 keV spectra in the northeast breakout region of CTB 1 are w…
Detection of polarized gamma-ray emission from the Crab nebula with Hitomi Soft Gamma-ray Detector
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +191
We present the results from the Hitomi Soft Gamma-ray Detector (SGD) observation of the Crab nebula. The main part of SGD is a Compton camera, which in addition to being a spectrom…
Study of Nature of Corona in Narrow Line Seyfert 1 Galaxies
Hiroshi H. Idogaki, Shunichi Ohmura, Hiroaki Takahashi +7
We study X-ray spectra of four Narrow Line Seyfert 1 galaxies (NLS1s), Mrk 110, SWIFT J2127.4+5654, IGR J16185-5928, and WKK 4438, using Suzaku and NuSTAR data. The spectra of the…