Abstract
AbstractWe re‐investigate UZ Libræ spectra obtained at KPNO in 1998 and 2000. From the 1998 data we compose 11 consecutive Doppler images using the Ca I‐6439, Fe I‐6393 and Fe I‐6411 lines. Applying the method of average cross‐correlation of contiguous Doppler images we find anti‐solar differential rotation with a surface shear of α ≈ –0.03. The pilot application of the local correlation tracking technique for the same data qualitatively confirms this result and indicates complex flow pattern on the stellar surface. From the cross‐correlation of the two available Doppler images in 2000 we also get anti‐solar differential rotation but with a much weaker shear of α ≈ –0.004. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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