E/B Separation in CMB Interferometry

Details E/B Separation in CMB Interferometry E/B Separation in CMB Interferometry

2003-04-09

arxiv.org/abs/astro-ph/0304167v4

Astrophys.J. 609 (2004) 15

Astronomy and Astrophysics

Astrophysics

21 pages, 11 figures, ApJ in press

Scientific paper

10.1086/420971

We study the problem of separating E and B modes in interferometric observations of the polarization of the cosmic microwave background. The E and B band powers and their mixings are measured from both single-dish and interferometric mock observations using the quadratic estimator of the maximum likelihood analysis. We find that the interferometer can separate E and B modes in a single-pointing measurement and is thus well suited for detecting the faint lensing induced and gravity-wave induced B modes. In mosaicking observation, compared to the single dish, the interferometer is in general more efficient in separating E and B modes, and for high signal-to-noise per pixel it needs about three times fewer pixels to measure extremely blue polarization power spectra.

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