ar X iv : a st ro - p h / 01 11 52 6 v 1 2 8 N ov 2 00 1 Chandra Observations of the Components of Clusters , Groups , and Galaxies and their Interactions

ar X iv : a st ro - p h / 01 11 52 6 v 2 3 D ec 2 00 1 Chandra Observations of the Components of Clusters , Groups , and Galaxies and their Interactions ⋆

We discuss two themes from Chandra observations of galaxies, groups, and clusters. First, we review the merging process as seen through the high angular resolution of Chandra. We present examples of sharp, edge-like surface brightness structures " cold fronts " , the boundaries of the remaining cores of merger components and the Chandra observations of CL0657, the first clear example of a stron...

ar X iv : a st ro - p h / 04 11 16 2 v 1 8 N ov 2 00 4 Chandra observations of the recurrent nova IM Nor

The recurrent nova IM Nor was observed twice in X-rays with Chandra ACISS, 1 and 6 months after the optical outburst. It was not detected in the first

ar X iv : a st ro - p h / 06 11 09 9 v 1 2 N ov 2 00 6 Nuclear Activity in UZC Compact Groups of Galaxies

ar X iv : a st ro - p h / 01 11 13 6 v 1 7 N ov 2 00 1 1 Active Optics in Modern , Large Optical Telescopes

ar X iv : a st ro - p h / 06 11 43 8 v 1 1 4 N ov 2 00 6 Lack of cooling flow clusters at z > 0 . 5

The goal of this work is to study the incidence rate of “cooling flows” in the high redshift clusters using Chandra observations of z > 0.5 objects from a new large, X-ray selected catalog [1]. We find that only a very small fraction of high-z objects have cuspy X-ray brightness profiles, which is a characteristic feature of the cooling flow clusters at z ∼ 0. The observed lack of cooling flows...