277 citations · 3k across the 69 of their papers we have counts for
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Extracting Galaxy Cluster Gas Inhomogeneity from X-ray Surface Brightness: A Statistical Approach and Application to Abell 3667
Hajime Kawahara, Erik D. Reese, Tetsu Kitayama +2
Our previous analysis indicates that small-scale fluctuations in the intracluster medium (ICM) from cosmological hydrodynamic simulations follow the lognormal distribution. In orde…
Systematic Errors in the Hubble Constant Measurement from the Sunyaev-Zel'dovich effect
Hajime Kawahara, Tetsu Kitayama, Shin Sasaki +1
The Hubble constant estimated from the combined analysis of the Sunyaev-Zel'dovich effect and X-ray observations of galaxy clusters is systematically lower than those from other me…
X-Ray Study of Temperature and Abundance Profiles of the Cluster of Galaxies Abell 1060 with Suzaku
Kosuke Sato, Noriko Y. Yamasaki, Manabu Ishida +14
We carried out observations of the central and 20' east offset regions of the cluster of galaxies Abell 1060 with Suzaku. Spatially resolved X-ray spectral analysis has revealed te…
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…
Soft X-ray Transmission Spectroscopy of Warm/Hot Intergalactic Medium with XEUS
Hajime Kawahara, Kohji Yoshikawa, Shin Sasaki +5
We discuss the detectability of Warm/Hot Intergalactic medium (WHIM) via the absorption lines toward bright point sources with a future X-ray satellite mission, XEUS. While we cons…