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A cross-correlation of WMAP and ROSAT

We cross-correlate the recent CMB WMAP 1 year data with the diffuse soft X-ray background map of ROSAT. We look for common signatures due to galaxy clusters (SZ effect in CMB, bremsstrahlung in X-rays) by cross-correlating the two maps in real and in Fourier space. We do not find any significant correlation and we explore the different reasons for this lack of correlation. The most likely candidates are the possibility that we live in a low $σ_8$ universe ($σ_8 < 0.9$) and/or systematic effects in the data especially in the diffuse X-ray maps which may suffer from significant cluster signal subtraction during the point source removal process.

preprint2003arXivOpen access
J. M. DiegoJ. SilkW. Sliwa
astro-ph
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Open access3 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
Citations: 0Reviews: 0Saves: 0Code: not linkedDataset: not linkedInstitutions: 0

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J. M. DiegoJ. SilkW. Sliwa

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