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arXiv · 0706.1703

Correlation between galactic HI and the Cosmic Microwave Background

Kate Land·Anze Slosar
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Abstract

We revisit the issue of a correlation between the atomic hydrogen gas in our local Galaxy and the Cosmic Microwave Background (CMB), a detection of which has been claimed in some literature. We cross-correlate the 21-cm emission of Galactic atomic hydrogen as traced by the Leiden/Argentine/Bonn Galactic HI survey with the 3-year CMB data from the Wilkinson Microwave Anisotropy Probe. We consider a number of angular scales, masks, and HI velocity slices and find no statistically significant correlation.

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Kate Land, Anze Slosar. 2007-08-31. Correlation between galactic HI and the Cosmic Microwave Background. https://doi.org/10.1103/physrevd.76.087301

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