25 citations · 151 across the 22 of their papers we have counts for
22 papers
Direct Observational Constraint on Upstream Magnetic Field Amplification Reveals the Particle Acceleration Limit in a Supernova Remnant
Yuya Kawabata, Takaaki Tanaka, Hiromasa Suzuki +1
The origin of Galactic cosmic rays up to the knee energy (PeV) remains a long-standing open question in astrophysics. Supernova remnant shocks are leading candidates for accelerati…
ALMA Observations of DEM L241/LMC P3 in the Large Magellanic Cloud: Evidence for the Formation of Cool Molecular Jets Driven by a Microquasar
Yasuo Fukui, Bhuvana G. R., Hidetoshi Sano +17
We present ALMA observations of DEML 241/LMC P3, the most luminous -ray binary consisting of a compact object and an O star, in CO emission. We have found an one-sided jet-like…
Imaging reconstruction method on X-ray data of CMOS polarimeter combined with coded aperture
Tsubasa Tamba, Hirokazu Odaka, Taihei Watanabe +7
X-ray polarization is a powerful tool for unveiling the anisotropic characteristics of high-energy celestial objects. We present a novel imaging reconstruction method designed for…
Measurement of Temperature Relaxation in the Postshock Plasma of the Northwestern Limb of SN 1006
Masahiro Ichihashi, Aya Bamba, Yuichi Kato +5
Heating of charged particles via collisionless shocks, while ubiquitous in the universe, is an intriguing yet puzzling plasma phenomenon. One outstanding question is how electrons…
Evaluation of the X-ray SOI pixel detector with the on-chip ADC
Hiroumi Matsuhashi, Kouichi Hagino, Aya Bamba +16
XRPIX is the monolithic X-ray SOI (silicon-on-insulator) pixel detector, which has a time resolution better than 10 s as well as a high detection efficiency for X-rays above…
Observational constraints on the maximum energies of accelerated particles in supernova remnants
Hiromasa Suzuki, Aya Bamba, Ryo Yamazaki +1
Supernova remnants (SNRs) are thought to be the most plausible sources of Galactic cosmic rays. One of the principal questions is whether they are accelerating particles up to the…
Global deceleration and inward movements of X-ray knots and rims of RCW 103
Hiromasa Suzuki, Takaaki Tanaka, Tsuyoshi Inoue +2
Kinematics of shocks, ejecta knots, and the compact remnant of a supernova remnant gives an insight into the nature of the progenitor and surrounding environment. We report on a pr…
Joint H.E.S.S. and Fermi-LAT analysis of the region around PSR J1813-1749
T. Wach, A. M. W. Mitchell, V. Joshi +1
HESS J1813-178 is one of the brightest sources detected during the first HESS Galactic Plane survey. The compact source, also detected by MAGIC, is believed to be a pulsar wind neb…
Modelling of highly extended Gamma-ray emission around the Geminga Pulsar as detected with H.E.S.S
A. M. W. Mitchell, S. Caroff
Geminga is an enigmatic radio-quiet gamma-ray pulsar located at a mere 250 pc distance from Earth. Extended very-high-energy gamma-ray emission around the pulsar has been detected…
A dynamical model for IRAS 00500+6713: the remnant of a type Iax supernova SN 1181 hosting a double degenerate merger product WD J005311
Takatoshi Ko, Hiromasa Suzuki, Kazumi Kashiyama +6
IRAS 00500+6713 is a hypothesized remnant of a type Iax supernova SN 1181. Multi-wavelength observations have revealed its complicated morphology; a dusty infrared ring is sandwich…
A broadband X-ray imaging spectroscopy in the 2030s: the FORCE mission
Koji Mori, Takeshi G. Tsuru, Kazuhiro Nakazawa +49
In this multi-messenger astronomy era, all the observational probes are improving their sensitivities and overall performance. The Focusing on Relativistic universe and Cosmic Evol…
Xtend, the Soft X-ray Imaging Telescope for the X-ray Imaging and Spectroscopy Mission (XRISM)
Koji Mori, Hiroshi Tomida, Hiroshi Nakajima +52
Xtend is a soft X-ray imaging telescope developed for the X-Ray Imaging and Spectroscopy Mission (XRISM). XRISM is scheduled to be launched in the Japanese fiscal year 2022. Xtend…
Orbital- and spin-phase variability in the X-ray emission from the accreting pulsar Cen X-3
Tsubasa Tamba, Hirokazu Odaka, Atsushi Tanimoto +3
We analyzed 39 ks NuSTAR observation data of the high mass X-ray binary Cen X-3 in order to investigate the orbital- and spin-phase spectral variability. The observation covers the…
Particle acceleration controlled by ambient density in the southwestern rim of RCW 86
Hiromasa Suzuki, Satoru Katsuda, Takaaki Tanaka +3
Particle acceleration physics at supernova remnant (SNR) shocks is one of the most intriguing problems in astrophysics. SNR RCW~86 provides a suitable environment for understanding…
Observational constraints on the maximum energies of accelerated particles in supernova remnants: low maximum energies and a large variety
Hiromasa Suzuki, Aya Bamba, Ryo Yamazaki +1
Supernova remnants (SNRs) are thought to be the most promising sources of Galactic cosmic rays. One of the principal questions is whether they are accelerating particles up to the…
Spatial and Temporal Variations of the Chandra ACIS Particle-Induced Background and Development of a Spectral-Model Generation Tool
Hiromasa Suzuki, Paul P. Plucinsky, Terrance J. Gaetz +1
In X-ray observations, estimation of the particle-induced background is important especially for faint and/or diffuse sources. Although software exists to generate total (sky and d…
Quantitative Age Estimation of Supernova Remnants and Associated Pulsars
Hiromasa Suzuki, Aya Bamba, Shinpei Shibata
The age of a supernova remnant (SNR) is, though undoubtedly one of the most important properties for study of its evolution, difficult to estimate reliably in most cases. In this s…
Origin of the in-orbit instrumental background of the Hard X-ray Imager onboard Hitomi
Kouichi Hagino, Hirokazu Odaka, Goro Sato +43
Understanding and reducing the in-orbit instrumental backgrounds are essential to achieving high sensitivity in hard X-ray astronomical observations. The observational data of the…
Development of the detector simulation framework for the Wideband Hybrid X-ray Imager onboard FORCE
Hiromasa Suzuki, Tsubasa Tamba, Hirokazu Odaka +8
FORCE is a Japan-US space-based astronomy mission for an X-ray imaging spectroscopy in an energy range of 1--80 keV. The Wideband Hybrid X-ray Imager (WHXI), which is the main foca…
Study on the escape timescale of high-energy particles from supernova remnants through thermal X-ray properties
Hiromasa Suzuki, Aya Bamba, Ryo Yamazaki +1
In this decade, GeV/TeV gamma-ray observations of several supernova remnants (SNRs) have implied that accelerated particles are escaping from their acceleration sites. However, whe…
Uniform distribution of the extremely overionized plasma associated with the supernova remnant G359.1-0.5
Hiromasa Suzuki, Aya Bamba, Rei Enokiya +3
We report on the results of our detailed analyses on the peculiar recombining plasma of the supernova remnant (SNR) G359.10.5, and the interacting CO clouds. Combining {\it Chan…
Discovery of recombining plasma from the faintest GeV SNR HB 21 and a possible scenario of the cosmic ray escaping from SNR shocks
Hiromasa Suzuki, Aya Bamba, Kazuhiro Nakazawa +4
We present an X-ray study of the GeV gamma-ray supernova remnant (SNR) HB 21 with Suzaku. HB 21 is interacting with molecular clouds and the faintest in the GeV band among known Ge…