Modeling the crossover variability in a differentially rotating star
Main Astronomical Observatory, 27 Zabolotnogo Str., 03650 Kyiv, Ukraine e-mail: email@example.com
2 Isaac Newton Institute of Chile, Kiev Branch
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