Search Publications
Suzaku Observations of the Hydra A Cluster out to the Virial Radius
Sato, Kosuke; Fukazawa, Yasushi; Nakazawa, Kazuhiro +12 more
We report on Suzaku observations of the northern half of the Hydra A cluster out to ∼ 1.4 Mpc, reaching the virial radius. There are the first Suzaku observations of a medium-size (kT ∼ 3 keV) cluster out to the virial radius. Two observations were conducted, north-west and north-east offsets, which continue in a filament direction and a void dire…
X-Ray Groups of Galaxies at 0.5 < z < 1 in zCOSMOS: Increased AGN Activities in High Redshift Groups
Koekemoer, Anton M.; Tresse, Laurence; Contini, Thierry +48 more
We present a photometric and spectroscopic study of galaxies at 0.5 < z < 1 as a function of the environment based on data from the zCOSMOS survey. There is a fair amount of evidence that galaxy properties depend on the mass of groups and clusters, in the sense that quiescent galaxies prefer more massive systems. We base our analysis on a ma…
Search for Diffuse X-Rays from the Bow Shock Region of Runaway Star BD +43 3654 with Suzaku
Tashiro, Makoto S.; Terada, Yukikatsu; Kouzu, Tomomi +4 more
The bow shocks of runaway stars with strong stellar winds of over 2000 km s
A Method of Identifying AGNs Based on Emission-Line Excess and the Nature of Low-Luminosity AGNs in the Sloan Digital Sky Survey. I. A New Method
Tanaka, Masayuki
We developed a new technique for identifying active galactic nuclei (AGNs) and studied the nature of low-luminosity AGNs in the Sloan Digital Sky Survey. This is the former part of a series of papers. We develop a new, sensitive method of identifying AGNs in this paper. The emission-line luminosity in a spectrum is the sum of a star-formation comp…
Suzaku Observation of Nearby On-Going Merger Cluster Abell 3627
Fukazawa, Yasushi; Nishino, Sho; Hayashi, Katsuhiro
We present the results of the Suzaku observation of a nearby (z = 0.016), on-going merger cluster, Abell 3627. The overall temperature of the ICM is around 7 keV, and we found a cool region with kT ∼ 4-5 keV at the position corresponding to the brightness excess from a spherically symmetrical β-model found by ROSAT. This structure seems to be a su…