Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822301s&link_type=abstract
American Astronomical Society, AAS Meeting #218, #223.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
An overview is given of the history and present status of observations and theory of magnetic fields as observed at the solar surface: their structure, their evolution, and their effect on the Sun's brightness. By a fortunate coincidence, the photosphere is the region most accessible to direct numerical MHD simulations. The spectacular level of qualitative and quantitative realism now possible is illustrated by comparisons with the equally remarkable advances high-resolution observations achieved in recents years. These comparisons are now yielding confident physical interpretations of many of the observed properties of the Sun's surface magnetic fields, including, for example the bewildering detail of sunspot structure. The controversial question of a possible connection between climate and brightness variations over the Sun's magnetic cycle will be discussed in the light of recent observational and numerical results.
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