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A new generation of solar dynamo model and its application to explore the stellar magnetic cycle

Published online by Cambridge University Press:  23 December 2024

Zebin Zhang Open the ORCID record for Zebin Zhang [Opens in a new window]
Zebin Zhang*
Affiliation:
School of Space and Environment, Beihang University, Beijing, China Key Laboratory of Space Environment Monitoring and Information Processing of MIIT, Beijing, China
*
email: [email protected]
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Abstract

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In most of the Babcock–Leighton (BL) type solar dynamo models, the toroidal magnetic field is assumed to be generated in the tachocline. However, magnetic activity of fully convective stars and MHD simulations of global stellar convection have recently raised serious doubts about the importance of the tachocline in the generation of the toroidal field. We have developed a BL-type dynamo model operating in the bulk of the convection zone, and are extending this model to solar-type stars. In this study, we aim at exploring how the starspot properties affect the stellar magnetic cycle. Observations show that faster rotating stars tend to have stronger magnetic activity and shorter magnetic cycles. By considering the higher latitudes and larger tilt angles of starspots for faster rotators, our simulations reproduce observations that faster rotating stars have shorter magnetic cycle and stronger activity.

Keywords

DynamoStars: activityStars: starspots
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S365: Dynamics of Solar and Stellar Convection Zones and Atmospheres , December 2023 , pp. 109 - 113
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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