![Doppler shifts resulting from a two-components Gaussian fit of the He I 10830 triplet intensity profiles. The velocity is saturated at ± 6 km/s. Vertical lines delimit the prominence feet. Doppler shifts resulting from a two-components Gaussian fit of the He I 10830 triplet intensity profiles. The velocity is saturated at ± 6 km/s. Vertical lines delimit the prominence feet.](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/news/resultados107_112.jpg?itok=-RMQ9nBI)
We present observational evidence of apparent plasma rotational motions in the feet of a solar prominence. Our study is based on spectroscopic observations taken in the \ion{He}{1}~1083.0~nm multiplet with the Tenerife Infrared Polarimeter attached to the German Vacuum Tower Telescope. We recorded a time sequence of spectra with 34 s cadence placing the slit of the spectrograph almost parallel to the solar limb and crossing two feet of an intermediate size, quiescent {\it hedgerow} prominence. The data show opposite Doppler shifts, $\pm$~6\kms, at the edges of the prominence feet. We argue
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