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Evidence for X-ray emission from a large-scale filament of galaxies ?
Caleb Scharf, Megan Donahue, G. Mark Voit +2
Cosmological simulations predict that a large fraction of the baryonic mass of the Universe exists as 10^5-10^7 K diffuse, X-ray emitting gas, tracing low density filament and shee…
High Redshift Clusters and Protoclusters
Marc Postman
Our understanding of the cosmic history of galaxy clusters has recently been enhanced due to an extensive series of observations including faint spectroscopic data (especially thos…
First Results from the Shellflow Survey
S. Courteau, J. A. Willick, M. A. Strauss +2
We present preliminary results from the Shellflow program, an all-sky Tully-Fisher (TF) survey of 297 Sb-Sc with redshifts between 4000 and 7500 km/s. The program was designed to e…
Spectroscopic Observations of Optically Selected Clusters of Galaxies from the Palomar Distant Cluster Survey
B. P. Holden, R. C. Nichol, A. K. Romer +4
We have conducted a redshift survey of sixteen cluster candidates from the Palomar Distant Cluster Survey (PDCS) to determine both the density of PDCS clusters and the accuracy of…
The CFH Optical PDCS Survey (COP): First results
C. Adami, B. Holden, A. Mazure +5
We present the first results of the COP survey about the reality of the PDCS clusters, about their velocity dispersions and dynamic and about the periodicity of the structures alon…