Evidence for Non-Linear Growth of Structure from an X-ray Selected Cluster Survey using a Novel Joint Analysis of the Chandra and XMM-Newton Archives TeX Export

@article{citeulike:6090781, abstract = {We present a large X-ray selected serendipitous cluster survey based on a novel joint analysis of archival Chandra and XMM-Newton data. The survey provides enough depth to reach clusters of flux of \$\approx 10^{-14} {ergs} {cm}^{-2} {s}^{-1}\$ near \$z\$ \$\approx\$ 1 and simultaneously a large enough sample to find evidence for the strong evolution of clusters expected from structure formation theory. We detected a total of 723 clusters of which 462 are newly discovered clusters with greater than 6\$\sigma\$ significance. In addition, we also detect and measure 261 previously-known clusters and groups that can be used to calibrate the survey. The survey exploits a technique which combines the exquisite Chandra imaging quality with the high throughput of the XMM-Newton telescopes using overlapping survey regions. A large fraction of the contamination from AGN point sources is mitigated by using this technique. This results in a higher sensitivity for finding clusters of galaxies with relatively few photons and a large part of our survey has a flux sensitivity between \$10^{-14}\$ and \$10^{-15} {ergs} {cm}^{-2} {s}^{-1}\$. The survey covers 41.2 square degrees of overlapping Chandra and XMM-Newton fields and 122.2 square degrees of non-overlapping Chandra data. We measure the log N-log S distribution and fit it with a redshift-dependent model characterized by a luminosity distribution proportional to \$e^{-\frac{z}{z\_0}}\$. We find that \$z\_0\$ to be in the range 0.7 to 1.3, indicative of rapid cluster evolution, as expected for cosmic structure formation using parameters appropriate to the concordance cosmological model.}, archivePrefix = {arXiv}, author = {Peterson, J. R. and Jernigan, J. G. and Gupta, R. R. and Bankert, J. and Kahn, S. M.}, citeulike-article-id = {6090781}, citeulike-linkout-0 = {http://arxiv.org/abs/0911.1327}, citeulike-linkout-1 = {http://arxiv.org/pdf/0911.1327}, day = {6}, eprint = {0911.1327}, keywords = {clusters, cosmology, xray}, month = {Nov}, posted-at = {2009-11-09 21:59:05}, priority = {2}, title = {Evidence for Non-Linear Growth of Structure from an X-ray Selected Cluster Survey using a Novel Joint Analysis of the Chandra and XMM-Newton Archives}, url = {http://arxiv.org/abs/0911.1327}, year = {2009} }

TY - JOUR ID - citeulike:6090781 L3 - citeulike-article-id:6090781 N2 - We present a large X-ray selected serendipitous cluster survey based on a novel joint analysis of archival Chandra and XMM-Newton data. The survey provides enough depth to reach clusters of flux of $\approx 10^{-14} {ergs} {cm}^{-2} {s}^{-1}$ near $z$ $\approx$ 1 and simultaneously a large enough sample to find evidence for the strong evolution of clusters expected from structure formation theory. We detected a total of 723 clusters of which 462 are newly discovered clusters with greater than 6$\sigma$ significance. In addition, we also detect and measure 261 previously-known clusters and groups that can be used to calibrate the survey. The survey exploits a technique which combines the exquisite Chandra imaging quality with the high throughput of the XMM-Newton telescopes using overlapping survey regions. A large fraction of the contamination from AGN point sources is mitigated by using this technique. This results in a higher sensitivity for finding clusters of galaxies with relatively few photons and a large part of our survey has a flux sensitivity between $10^{-14}$ and $10^{-15} {ergs} {cm}^{-2} {s}^{-1}$. The survey covers 41.2 square degrees of overlapping Chandra and XMM-Newton fields and 122.2 square degrees of non-overlapping Chandra data. We measure the log N-log S distribution and fit it with a redshift-dependent model characterized by a luminosity distribution proportional to $e^{-\frac{z}{z_0}}$. We find that $z_0$ to be in the range 0.7 to 1.3, indicative of rapid cluster evolution, as expected for cosmic structure formation using parameters appropriate to the concordance cosmological model. TI - Evidence for Non-Linear Growth of Structure from an X-ray Selected Cluster Survey using a Novel Joint Analysis of the Chandra and XMM-Newton Archives KW - clusters KW - cosmology KW - xray AU - Peterson, JR AU - Jernigan, JG AU - Gupta, RR AU - Bankert, J AU - Kahn, SM PY - 2009/Nov/06/ UR - http://arxiv.org/abs/0911.1327 ER -