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The Warps X-Ray Survey of Galaxies, Groups, and Clusters

  • D. Horner (a1), C.A. Scharf (a1), L.R. Jones (a2), H. Ebeling (a3), E. Perlman (a4), M. Malkan (a5) and G. Wegner (a6)...

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We have embarked on a survey of ROSAT PSPC archival data searching for all detected surface brightness enhancements due to sources in the innermost R ≤ 15′ of the PSPC field of view in the energy band 0.5–2.0 keV. This project is part of the Wide Angle ROSAT Pointed Survey (WARPS) and is designed primarily to measure the low luminosity, high redshift, X-ray luminosity function of galaxy clusters and groups. Accurate measurements of the high redshift XLF would allow the form of the XLF evolution to be determined via the position of the Schechter function break. This would help discriminate between luminosity and density evolution, and discriminate between different hierarchical models, e.g., those including a different mix of fundamental particles, a flat power spectrum of the initial fluctuations, and reheating of the intracluster gas at high redshifts.

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References

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Scharf, C.A., et al. Astrophys. J., in press.

The Warps X-Ray Survey of Galaxies, Groups, and Clusters

  • D. Horner (a1), C.A. Scharf (a1), L.R. Jones (a2), H. Ebeling (a3), E. Perlman (a4), M. Malkan (a5) and G. Wegner (a6)...

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