A&A 385, 896-899 (2002)
Modeling the crossover variability in a differentially rotating starV. R. Khalack1, 2
1 Main Astronomical Observatory, 27 Zabolotnogo Str., 03650 Kyiv, Ukraine
2 Isaac Newton Institute of Chile, Kiev Branch
(Received 12 October 2001 / Accepted 8 January 2002 )
Reconstruction of phase-dependent crossover effect variations is performed for a differentially rotating star assuming that point-like magnetic charges are distrubuted under the stellar surface. Models adopting the solar differential rotation law and an exponential rotation law are considered and compared to the case of a rigidly rotating star. It is shown that neglect of differential stellar rotation leads to underestimation of the equatorial rotational velocity by ~2-5%.
Key words: stars: magnetic fields -- stars: rotation -- Sun: rotation
© ESO 2002