The Sun’s Global Photospheric and Coronal Magnetic Fields: Observations and Models

Duncan H. Mackay 
University of St Andrews
School of Mathematics and Statistics, University of St Andrews,
North Haugh, St Andrews, Fife, KY16 9SS, UK

'External link'http://www-solar.mcs.st-andrews.ac.uk/~duncan
and
Anthony R. Yeates 
Department of Mathematical Sciences
Durham University, Science Laboratories,
South Road, Durham DH1 3LE, UK

'External link'http://www.maths.dur.ac.uk/~bmjg46

Abstract

In this review, our present day understanding of the Sun’s global photospheric and coronal magnetic fields is discussed from both observational and theoretical viewpoints. Firstly, the large-scale properties of photospheric magnetic fields are described, along with recent advances in photospheric magnetic flux transport models. Following this, the wide variety of theoretical models used to simulate global coronal magnetic fields are described. From this, the combined application of both magnetic flux transport simulations and coronal modeling techniques to describe the phenomena of coronal holes, the Sun’s open magnetic flux and the hemispheric pattern of solar filaments is discussed. Finally, recent advances in non-eruptive global MHD models are described. While the review focuses mainly on solar magnetic fields, recent advances in measuring and modeling stellar magnetic fields are described where appropriate. In the final section key areas of future research are identified.


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