Relic—Shock Connection in Abell 115

The Off - Axis Galaxy Cluster Merger Abell 115

We have used a 50.4 ksec Chandra observation to examine the galaxy cluster Abell 115 (z=0.1971). The X-ray surface brightness distribution shows a merger of 2 sub-clusters with substantial off-axis motion. The northern sub-cluster moves toward the southwest and exhibits a strong X-ray surface brightness gradient toward this direction as well as a “fan” of X-ray bright Intra-Cluster Medium (ICM)...

Temperature Variation in the Cluster of Galaxies Abell 115 Studied with ASCA

Abell 115 exhibits two distinct peaks in the surface brightness distribution. ASCA observation shows a significant temperature variation in this cluster, confirmed by a hardness ratio analysis and spectral fits. A linking region between main and sub clusters shows a high temperature compared with other regions. Two possibilities are examined as the cause of the temperature variation: cooling fl...

115 Polmear.qxd

Background. All children with urinary tract infections (UTIs) should undergo imaging of the urinary tract. The Royal College of Radiologists currently recommends that such children should be referred to a paediatric specialist prior to imaging. Aim. To investigate whether direct referral of such children by general practitioners (GPs) for imaging offers advantages over the traditional approach....

Abell Clusters

Dynamics of the X - ray clusters Abell 222 , Abell 223 and Abell 520 ⋆

We present the results of a dynamical analysis of three rich, X-ray luminous galaxy clusters, Abell 222, Abell 223 and Abell 520, that are at intermediate redshifts. Our study is based on radial velocities for 71 cluster members, respectively 30 for A 222, 20 for A 223 and 21 for A 520, measured from spectra obtained at the Canada-France-Hawaii Telescope, the European Southern Observatory, and ...