TY - GEN
T1 - How do polarized foregrounds affect 21cm EoR power spectrum detection?
AU - Moore, David F.
AU - Aguirre, James E.
AU - Parsons, Aaron R.
AU - Bradley, Richard F.
AU - Carilli, Christopher L.
AU - Deboer, David R.
AU - Ali, Zaki S.
AU - Liu, Adrian
AU - Jacobs, Daniel
AU - Pober, Jonathan C.
AU - Stefan, Irina I.
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/16
Y1 - 2014/10/16
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84911470118&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84911470118&partnerID=8YFLogxK
U2 - 10.1109/USNC-URSI-NRSM.2014.6928121
DO - 10.1109/USNC-URSI-NRSM.2014.6928121
M3 - Conference contribution
AN - SCOPUS:84911470118
T3 - 2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014
BT - 2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 United States National Committee of URSI National Radio Science Meeting, USNC-URSI NRSM 2014
Y2 - 8 January 2014 through 11 January 2014
ER -