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Bulk motions of electrons along the line of sight induce secondarytemperature fluctuations in the post-decoupling, reionized universe. In thepresence of a magnetic field not only the scalar mode but also the vector modeact as a source for the bulk motion. The resulting angular power spectrum oftemperature anisotropies of the cosmic microwave background is calculatedassuming a simple model of reionization.Contributions from the standardadiabatic, curvature mode and a non helical magnetic field are included. Thecontribution due to magnetic fields with field strengths of order nG andnegative magnetic spectral indices becomes important for multipoles larger than$\ell \sim 10^4$.

Secondary CMB anisotropies from bulk motions in the presence of stochastic magnetic fields