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One Thousand and One Clusters: Measuring the Bulk Flow with the Planck ESZ and X-Ray Selected Galaxy Cluster Catalogs

We present our measurement of the "bulk flow" using the kinetic Sunyaev-Zel'dovich (kSZ) effect in the WMAP 7-year data. As the tracer of peculiar velocities, we use Planck Early Sunyaev-Zel'dovich Detected Cluster Catalog and a compilation of X-ray detected galaxy cluster catalogs based on ROSAT All-Sky Survey. We build a full-sky kSZ template and fit it to the WMAP data in W-band. Using a Wiener filter we maximize the signal to noise ratio of the kSZ cluster signal in the data. We find no significant detection of the bulk flow, and our results are consistent with the LCDM prediction.

preprint2012arXivOpen access
Krishnan ModyAmir Hajian
astro-ph.COgr-qc
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Krishnan ModyAmir Hajian

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