How do polarized foregrounds affect 21cm EoR power spectrum detection?

David F. Moore, James E. Aguirre, Aaron R. Parsons, Richard F. Bradley, Christopher L. Carilli, David R. Deboer, Zaki S. Ali, Adrian Liu, Daniel Jacobs, Jonathan C. Pober, Irina I. Stefan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Polarized foregrounds pose a threat for attempts to measure the 21cm Epoch of Reionization (EoR) power spectrum. Faraday rotation of natively polarized synchrotron emission modulates the phase of the polarization states Q and U by a factor of exp{-2iRMλ2}, where λ is the wavelength of incident light, and RM is a function of the magnetic field and electron density along the line of sight. This phase-factor is non-orthogonal to the frequency sine waves composing the EoR power spectrum, creating a potential leakage from polarized emission into the power spectrum. My recent paper, Moore, et al. 2013, exposes this as a problem, and presents a simulation estimating its severity.

Original languageEnglish (US)
Title of host publication2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479931200
DOIs
StatePublished - Oct 16 2014
Event2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014 - Boulder, United States
Duration: Jan 8 2014Jan 11 2014

Publication series

Name2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014

Other

Other2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014
CountryUnited States
CityBoulder
Period1/8/141/11/14

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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