Short, Joanna and Coles, Peter ORCID: https://orcid.org/0000-0002-5535-2850 2010. Zonal modes of Cosmic Microwave Background temperature maps. Monthly Notices of the Royal Astronomical Society 401 (4) , pp. 2202-2206. 10.1111/j.1365-2966.2009.15833.x |
Abstract
All-sky maps of the cosmic microwave background temperature fluctuations are usually represented by a spherical harmonic decomposition, involving modes labelled by their degree ℓ and order m (where −ℓ≤m≤+ℓ). The zonal modes (i.e. those with m= 0) are of particular interest because they vary only with galactic latitude; any anomalous behaviour in them might therefore be an indication of erroneous foreground substraction. We perform a simple statistical analysis of the modes with low ℓ for sky maps derived via different cleaning procedures from the Wilkinson Microwave Anisotropy Probe, and show that the zonal modes provide a useful diagnostic of possible systematics.
Item Type: | Article |
---|---|
Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Subjects: | Q Science > QB Astronomy |
Uncontrolled Keywords: | methods: data analysis; cosmic microwave background; observations |
Publisher: | Wiley |
ISSN: | 0035-8711 |
Last Modified: | 19 Oct 2022 10:10 |
URI: | https://orca.cardiff.ac.uk/id/eprint/23457 |
Citation Data
Cited 2 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
Edit Item |