Correlation between galactic HI and the Cosmic Microwave Background

Details Correlation between galactic HI and the Cosmic Microwave Background Correlation between galactic HI and the Cosmic Microwave Background

2007-06-12

arxiv.org/abs/0706.1703v2

Phys.Rev.D76:087301,2007

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, accepted in PRD brief report

Scientific paper

10.1103/PhysRevD.76.087301

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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