Foreground contamination of the WMAP CMB maps from the perspective of the matched circle test

Holger L Then

Research output: Contribution to journalArticle (Academic Journal)

10 Citations (Scopus)
186 Downloads (Pure)

Abstract

Wilkinson Microwave Anisotropy Probe has provided cosmic microwave background (CMB) maps of the full sky. The raw data are subject toforeground contamination, in particular near to the Galactic plane. Foreground-cleaned maps have been derived, e.g. the internal linearcombination map of Bennett et al., and the reduced foreground TOH map ofTegmark et al. Using S statistics, we examine whether residual foreground contamination is left over in the foreground-cleaned maps. Inparticular, we specify which parts of the foreground-cleaned maps are sufficiently accurate for the circle-in-the-sky signature. We generalizethe S statistic, called D statistic, such that the circle test can dealwith CMB maps in which the contaminated regions of the sky are excludedwith masks.
Original languageEnglish
Pages (from-to)139-145
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume373
Issue number1
Early online date25 Oct 2006
DOIs
Publication statusPublished - 21 Nov 2006

Keywords

  • methods: data analysis
  • methods: statistical
  • cosmic microwave background
  • cosmology: miscellaneous
  • large-scale structure of Universe

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