Living Reviews in Solar Physics

"Starspots: A Key to the Stellar Dynamo"
by
Svetlana V. Berdyugina  

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Abstract
1 Introduction
2 The Phenomenon of Stellar Activity
2.1 Red dwarfs and BY Dra phenomenon
2.2 Solar-type stars
2.3 T Tauri stars
2.4 RS CVn stars
2.5 FK Com stars
2.6 W UMa stars
2.7 Algols
2.8 Degenerate stars
3 Observational Tools for Studying Starspots
3.1 Photometry
3.2 Spectroscopy
3.3 Polarimetry
3.4 Interferometry
3.5 Microlensing
4 Diagnostic Techniques for Studying Starspots
4.1 Light-curve modelling
4.2 Doppler Imaging
4.3 Zeeman–Doppler Imaging
4.4 Molecular bands modelling
4.5 Line depth ratios
4.6 Asteroseismology
5 Starspot Properties
5.1 Temperature and filling factor
5.2 Magnetic field
5.3 Lifetimes
5.4 Active longitudes
5.5 Differential rotation
5.6 Latitudes and butterfly diagrams
6 Starspot Evolution and Stellar Activity Cycles
6.1 Overall activity variations
6.2 Flip-flop cycles
6.3 Orbital period modulation
7 Theoretical Models
7.1 Dynamo models
7.2 Flux-tube models
8 Summary
Acknowledgements
9 Additional Tables
Open References References
Figures
Tables