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13 papers · 2 filters
Suzaku Spectroscopy Study of Hard X-Ray Emission in the Arches Cluster
M. Tsujimoto, Y. Hyodo, K. Koyama
We present the results of a Suzaku study of the Arches cluster. A high S/N spectrum in the 3-12 keV band was obtained with the XIS. We found that the spectrum consists of a thermal…
Hard X-rays from Ultra-Compact HII Regions in W49A
M. Tsujimoto, T. Hosokawa, E. D. Feigelson +2
We report the Chandra detection of hard X-ray emission from the Welch ring in W49A, an organized structure of ultra-compact (UC) HII regions containing a dozen nascent early-type s…
Black hole accretion: theoretical limits and observational implications
D. Heinzeller, W. J. Duschl, S. Mineshige +1
Recently, the issue of the role of the Eddington limit in accretion discs became a matter of debate. While the classical (spherical) Eddington limit is certainly an over-simplifica…
Suzaku Observation of Diffuse X-ray Emission from the Carina Nebula
Kenji Hamaguchi, Robert Petre, Hironori Matsumoto +9
We studied extended X-ray emission from the Carina Nebula taken with the Suzaku CCD camera XIS on 2005 Aug. 29. The X-ray morphology, plasma temperature and absorption to the plasm…
An X-ray Census of Young Stars in the Massive Southern Star-Forming Complex NGC 6357
Junfeng Wang, Leisa K. Townsley, Eric D. Feigelson +4
We present the first high spatial resolution X-ray study of the massive star forming region NGC 6357, obtained in a 38 ks Chandra/ACIS observation. Inside the brightest constituent…
Spectral energy distribution of super-Eddington flows
D. Heinzeller, S. Mineshige, K. Ohsuga
Spectral properties of super-Eddington accretion flows are investigated by means of a parallel line-of-sight calculation. The subjacent model, taken from two-dimensional radiation…