From the 1 of 954 papers with an AI index.
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5 papers · 2 filters
Dust in Hot Plasma of Nearby Dusty Elliptical Galaxies Observed with the Spitzer Space Telescope
H. Kaneda, T. Onaka, T. Kitayama +2
We report on mid- and far-IR Spitzer observations of 7 nearby dusty elliptical galaxies by using the Multiband Imaging Photometer (MIPS) and Infrared Spectrograph (IRS). Our sample…
Radial profile and log-normal fluctuations of intra-cluster medium as an origin of systematic bias of spectroscopic temperature
Hajime Kawahara, Yasushi Suto, Tetsu Kitayama +4
The origin of the recently reported systematic bias in the spectroscopic temperature of galaxy clusters is investigated using cosmological hydrodynamical simulations. We find that…
Early Cosmological HII/HeIII Regions and Their Impact on Second-Generation Star Formation
Naoki Yoshida, S. Peng Oh, Tetsu Kitayama +1
(Abridged) We present the results of three-dimensional radiation-hydrodynamics simulations of the formation and evolution of early HII/HeIII regions around the first stars. Cooling…
DIOS: the Diffuse Intergalactic Oxygen Surveyor
T. Ohashi, M. Ishida, S. Sasaki +14
We present our proposal for a small X-ray mission DIOS (Diffuse Intergalactic Oxygen Surveyor), consisting of a 4-stage X-ray telescope and an array of TES microcalorimeters, coole…
Systematic bias in the estimate of cluster mass and the fluctuation amplitude from cluster abundance statistics
Mamoru Shimizu, Tetsu Kitayama, Shin Sasaki +1
We revisit the estimate of the mass fluctuation amplitude, sigma_8, from the observational X-ray cluster abundance. In particular, we examine the effect of the systematic differenc…