# Observational limits on patchy reionization: Implications for B modes

@article{Mortonson2010ObservationalLO, title={Observational limits on patchy reionization: Implications for B modes}, author={Michael J. Mortonson and Wayne Hu}, journal={Physical Review D}, year={2010}, volume={81}, pages={067302} }

The recent detection of secondary CMB anisotropy by the South Pole Telescope limits temperature fluctuations from the optical depth-modulated Doppler effect to ${T}_{3000}l\sqrt{13}\ensuremath{\mu}\mathrm{K}$ at multipoles $\ensuremath{\ell}\ensuremath{\sim}3000$. This bound is the first empirical constraint on optical depth fluctuations at arcminute scales, ${\ensuremath{\tau}}_{3000}=0.001{T}_{3000}/\ensuremath{\mu}\mathrm{K}$, implying that these fluctuations are no more than a few percent… CONTINUE READING