Correlation between galactic HI and the Cosmic Microwave Background
Kate Land, Anze Slosar
TL;DR
This study investigates the potential correlation between Galactic atomic hydrogen gas and the Cosmic Microwave Background, finding no significant correlation across various scales and data sets.
Contribution
It provides a comprehensive cross-correlation analysis between Galactic HI emission and CMB data, clarifying previous claims of correlation.
Findings
No statistically significant correlation found.
Analysis across multiple scales and data sets.
Revisits and challenges prior claims of correlation.
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.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.