Dynamics of the Multiple Merger Cluster of Galaxies (2007)
S. Vrtilek, E. M. Schlegel, L. Kuhi, Joshua C. Kempner, Craig L. Sarazin, Paul M. Ricker
Abstract. We present Cycle 1 Chandra observations of the Abell 85 cluster of galaxies. The cluster has a moderately strong cooling ow, but is in the early stages of a multiple merger with two smaller...
Accepted for publication in the Astrophysical Journal. We have undertaken a systematic search for diffuse radio halos and relics in all of the Abell clusters that are visible in the Westerbork...
Cosmic Structure Traced by Precision (2007)
Measurements Of The, Thomas H. Reiprich, Craig L. Sarazin, Joshua C. Kempner, Michael F, Gregory R. Sivakoff, ...
The current status of our efforts to trace cosmic structure with 10 6 galaxies (2MASS), 10 3 galaxy clusters (NORAS II cluster survey), and precision measurements for 10 galaxy clusters (HIFLUGCS) is...
A Chandra Observation of Abell 13: Investigating the Origin of the Radio Relic (2007)
Juett, Adrienne M., Sarazin, Craig L., Clarke, Tracy E., Andernach, Heinz, Ehle, Matthias, Fujita, Yutaka, ...
We present results from the Chandra X-ray observation of Abell 13, a galaxy cluster that contains an unusual noncentral radio source, also known as a radio relic. This is the first pointed X-ray...
Chandra Observation of Abell 2065: An Unequal Mass Merger? (2006)
Chatzikos, Marios, Sarazin, Craig L., Kempner, Joshua C.
We present an analysis of a 41 ks Chandra observation of the merging cluster Abell 2065 with the ACIS-I detector. Previous observations with ROSAT and ASCA provided evidence for an ongoing merger,...
A Chandra Study of the Core of the Nearby Cluster Abell 576 (2004)
Kempner, Joshua C., David, Laurence P.
We present data from a Chandra observation of the nearby cluster of galaxies Abell 576. The core of the cluster shows a significant departure from dynamical equilibrium. We show that this core gas is...
A Taxonomy of Extended Radio Sources in Clusters of Galaxies (2003)
Kempner, Joshua C., Blanton, Elizabeth L., Clarke, Tracy E., Ensslin, Torsten A., Johnston-Hollitt, Melanie, Rudnick, Lawrence
At the request of the conference attendees, we have compiled a classification of extended radio sources in clusters. These range from scales of tens of parsecs to over a megaparsec in scale, and...
Chandra Observation of the Core of Abell 576 (2003)
Kempner, Joshua C., David, Laurence P.
We present data from a Chandra observation of the nearby cluster of galaxies Abell 576. The core of the cluster shows a significant departure from dynamical equilibrium. We show that this core gas is...
A Chandra View of the Multiple Merger In Abell 2744 (2003)
Kempner, Joshua C., David, Laurence P.
We present a Chandra observation of the merging cluster of galaxies Abell 2744. The cluster shows strong evidence for an ongoing major merger which we believe to be responsible for the radio halo....
XMM-Newton Observation of the Merging Galaxy Cluster A1644 (2003)
Reiprich, Thomas H., Sarazin, Craig L., Kempner, Joshua C., Tittley, Eric
An XMM-Newton imaging spectroscopy analysis of the galaxy cluster A1644 is presented. A1644 is a complex merging system consisting of a main and a sub cluster. A trail of cool, metal-rich gas has...
Reiprich, Thomas H., Sarazin, Craigh, Kempner, Joshua C., Skrutskie, Michael F., Sivakoff, Gregory R., Böhringer, Hans, ...
Reiprich, Thomas H., Sarazin, Craig L., Kempner, Joshua C., Skrutskie, Michael F., Sivakoff, Gregory R., Boehringer, Hans, ...
The current status of our efforts to trace cosmic structure with 10^6 galaxies (2MASS), 10^3 galaxy clusters (NORAS II cluster survey), and precision measurements for 10^2 galaxy clusters (HIFLUGCS)...
Chandra Observations of the Disruption of the Cool Core in Abell 133 (2002)
Fujita, Yutaka, Sarazin, Craig L., Kempner, Joshua C., Rudnick, L., A, O. B. Slee, Roy, . L., ...
We present the analysis of a Chandra observation of the galaxy cluster Abell 133, which has a cooling flow core, a central radio source, and a diffuse, filamentary radio source which has been...
Radio Halo and Relic Candidates from the Westerbork Northern Sky Survey (2000)
Kempner, Joshua C., Sarazin, Craig L.
We have undertaken a systematic search for diffuse radio halos and relics in all of the Abell clusters that are visible in the Westerbork Northern Sky Survey (WENSS). In this survey we found 18...
Nonthermal Bremsstrahlung and Hard X-ray Emission from Clusters of Galaxies (1999)
Sarazin, Craig L., Kempner, Joshua C.
We have calculated nonthermal bremsstrahlung (NTB) models for the hard X-ray (HXR) tails recently observed by BeppoSAX in clusters of galaxies. In these models, the HXR emission is due to...
Limits on the Diffuse Radio and Hard X-ray Emission of Abell 2199 (1999)
Kempner, Joshua C., Sarazin, Craig L.
The Westerbork Northern Sky Survey (WENSS) and the NRAO/VLA Sky Survey (NVSS) were used to determine an upper limit to the diffuse radio flux from the nearby cluster Abell 2199. For the entire...