New limits on the polarized anisotropy of the cosmic microwave background at subdegree angular scales

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

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

We update the limit from the 90 GHz Princeton IQU Experiment ground-based polarimeter on the magnitude of any polarized anisotropy of the cosmic microwave radiation. With a second year of data, we have now limited both Q and U on a ring of 1° radius. The window functions are broad: for E-mode polarization, the effective l is 〈lE〉 = 191 -132+143. We find that the E-mode signal can be no greater than 8.4 μK (95% CL), assuming no 5-mode polarization. Limits on a possible 5-mode signal are also presented.

Original languageEnglish (US)
Pages (from-to)L73-L76
JournalAstrophysical Journal
Volume573
Issue number2 II
DOIs
StatePublished - Jul 10 2002

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Cosmic microwave background
  • Cosmology: observations
  • Early universe

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