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Merger shocks in Abell 3667 and the Cygnus A cluster
Finoguenov, A.; Wik, D. R.; Sarazin, C. L.
We present new XMM-Newton observations of the northwest (NW) radio relic region in the cluster Abell 3667. We detect a jump in the X-ray surface brightness and X-ray temperature at the sharp outer edge of the radio relic which indicate that this is the location of a merger shock with a Mach number of about 2. Comparing the radio emission to the sh…
Bulk motion measurements in clusters of galaxies with ATHENA-like missions
Nevalainen, J.
The hierarchical formation of clusters of galaxies by accretion of material releases gravitational energy which dissipates into the intracluster gas. The process heats the material and generates gas turbulence and bulk motions and thus kinetic pressure. Mapping the velocity fields of the moving subunits would enable a new diagnostics tool for clus…
X-ray measurement of the elemental abundances at the outskirts of the Perseus cluster with Suzaku
Hayashida, K.; Tsunemi, H.; Ueda, S. +1 more
We report on the abundance of metals (Mg and Fe) in the intracluster medium (ICM) at the outskirts (0.2 r200-0.8 r200) of the Perseus cluster. The X-ray spectra were obtained in the Suzaku/XIS mapping observations of this region. We employ single temperature models to fit all the X-ray spectra. The ICM temperature smoothly de…
X-ray study of clusters at the outer edge and beyond
Akamatsu, H.; Ohashi, T.; Takei, Y. +2 more
We report on recent Suzaku results on cluster outer regions. Relaxed clusters show a monotonous temperature decline to the virial radii, reaching 1/3 to 1/4 of the central levels. Significant temperature jumps have been confirmed for a number of radio relics, including A 3667, A 3376, and CIZA J2242.8+5301. This confirms that the radio relics gene…