Publications of the Astronomical Society of Japan 2024年2月 [査読有り]
Abstract
We develop a new deconvolution method to recover the precise Crab Nebula image taken by the Hitomi HXT, suppressing the artifact due to the bright Crab pulsar. We extend the Richardson–Lucy method, introducing two components correspondi...
Asca Miyamoto   Yasuharu Sugawara   Yoshitomo Maeda   Manabu Ishida   Kenji Hamaguchi   Michael Corcoran   Christopher M P Russell   Anthony F J Moffat   
Monthly Notices of the Royal Astronomical Society 527(3) 7121-7135 2023年11月 [査読有り]
ABSTRACT
We analyse the XMM–Newton RGS spectra of Wolf–Rayet (WR) 140, an archetype long-period eccentric WR+O colliding wind binary. We evaluate the spectra of O and Fe emission lines and find that the plasmas emitting these lines have the larg...
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1048 167975-167975 2023年3月 [査読有り]
K Ebisawa   Y Maeda   H Kaneda   S Yamauchi   
SCIENCE 293(5535) 1633-1635 2001年8月
The Galactic plane is a strong emitter of hard x-rays (2 to 10 kiloelectron volts), and the emission forms a narrow continuous ridge. The currently known hard x-ray sources are far too few to explain the ridge x-ray emission, and the fundamental q...
H Murakami   K Koyama   Y Maeda   M Sakano   
NEW CENTURY OF X-RAY ASTRONOMY 251 310-311 2001年
We present a Chandra observation of the giant molecular cloud Sgr B2 at the Galactic center region. We detected diffuse X-ray emission and 17 point sources in the cloud. The diffuse emission shows a strong 6.4 keV line from neutral iron, and is pr...
Front the ASCA X-ray point-source list in the Galactic center 5 x 5 degree(2) region, we found the clear correlation between the position of the sources and the absorption. This fact implies that the major part of the absorption is due to the cold...