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Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter
Douglas Clowe, Anthony Gonzalez, Maxim Markevitch
We present a weak lensing mass reconstruction of the interacting cluster 1E0657-558 in which we detect both the main cluster and a sub-cluster. The sub-cluster is identified as a s…
Direct constraints on the dark matter self-interaction cross-section from the merging galaxy cluster 1E0657-56
M. Markevitch, A. H. Gonzalez, D. Clowe +6
We compare new maps of the hot gas, dark matter, and galaxies for 1E0657-56, a cluster with a rare, high-velocity merger occurring nearly in the plane of the sky. The X-ray observa…
A Possible Shock Wave in the Intergalactic Medium of the Cluster of Galaxies A754
R. Krivonos, A. Vikhlinin, M. Markevitch +1
The cluster of galaxies A754 undergoes a merger of several large structural units. X-ray observations show a nonequilibrium state of the central part of the cluster, in which a clo…
An Unusual Discontinuity in the X-ray Surface Brightness Profile of NGC 507: Evidence of an Abundance Gradient?
R. P. Kraft, W. R. Forman, E. Churazov +6
We present results from a 45 ks Chandra/ACIS-I observation of the nearby () NGC 507 group. The X-ray surface brightness profile of the outer region of the group is well…
Chandra Observation of the Merging Cluster Abell 2034
J. C. Kempner, C. L. Sarazin, M. Markevitch
We present an analysis of a Chandra observation of Abell 2034. The cluster has multiple signatures of an ongoing merger, including a cold front and probable significant heating of…
Chandra Temperature Map of Abell 754 and Constraints on Thermal Conduction
M. Markevitch, P. Mazzotta, A. Vikhlinin +9
We use Chandra data to derive a detailed gas temperature map of the nearby, hot, merging galaxy cluster A754. Combined with the X-ray and optical images, the map reveals a more com…