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2009

B-mode CMB Polarization from Patchy Screening during Reionization

Dvorkin, Cora, Hu, Wayne, Smith, Kendrick M.

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B-modes in CMB polarization from patchy reionization arise from two effects: generation of polarization from scattering of quadrupole moments by reionization bubbles, and fluctuations in the screening of E-modes from recombination.

The scattering contribution has been studied previously, but the screening contribution has not yet been calculated.
We show that on scales smaller than the acoustic scale (l>300), the B-mode power from screening is larger than the B-mode power from scattering.
The ratio approaches a constant ~2.5 below the damping scale (l>2000).

B-mode CMB Polarization from Patchy Screening during Reionization · Around

Built on

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J. Weller, Astrophys. J. 527
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G.-C. Liu, N. Sugiyama, A. J. Benson, C. G. Lacey, and A. Nusser (2001), eprint astro-ph/0101368
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W. Hu, M. M. Hedman, and M. Zaldarriaga, Phys. Rev. D67
2003
Earlier work this paper cites.

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