Abstract
Abstract The cosmic infrared background (CIB) is slightly polarized. Polarization directions of individual galaxies could be aligned with tidal fields around galaxies, resulting in nonzero CIB polarization. We use a linear intrinsic alignment model to theoretically predict angular correlations of the CIB polarization fluctuations and find that electriclike and curl-like (B-mode) polarization modes are equally generated with power four orders of magnitude less than their intensity. The CIB B-mode signal is negligible and not a concerning foreground for the inflationary B-mode searches at nominal frequencies for cosmic microwave background measurements, but could be detected at submillimeter wavelengths by future space missions.
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