| Issue |
A&A
Volume 385, Number 3, April III 2002
|
|
|---|---|---|
| Page(s) | 896 - 899 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20020177 | |
| Published online | 15 April 2002 | |
Modeling the crossover variability in a differentially rotating star
1
Main Astronomical Observatory, 27 Zabolotnogo Str., 03650 Kyiv, Ukraine e-mail: khalack@mao.kiev.ua
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
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