A limit on the polarized anisotropy of the cosmic microwave background at subdegree angular scales

M. M. Hedman, D. Barkats, J. O. Gundersen, S. T. Staggs, B. Winstein

Research output: Contribution to journalArticle

40 Scopus citations

Abstract

A ground-based polarimeter, PIQUE, operating at 90 GHz has set a new limit on the magnitude of any polarized anisotropy in the cosmic microwave background. The combination of the scan strategy and full width half-maximum beam of 0°.24 gives broad window functions with (IE) = 211+294-146 and (IB) 212+229-135 for the E- and B-mode window functions, respectively. A joint likelihood analysis yields simultaneous 95% confidence level flat band power limits of 14 and 13 μK on the amplitudes of the E- and B-mode angular power spectra, respectively. Assuming no B-modes, a 95% confidence limit of 10 μK is placed on the amplitude of the E-mode angular power spectrum alone.

Original languageEnglish (US)
Pages (from-to)L111-L114
JournalAstrophysical Journal
Volume548
Issue number2 PART 2
DOIs
StatePublished - Feb 20 2001
Externally publishedYes

Keywords

  • Cosmic microwave background
  • Cosmology: observations
  • Polarization

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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