Down the sunspot plughole

Karen Southwell

Nature, 1997, vol. 389, issue 6646, 23-23

Abstract: Sunspots are relatively cool regions of the solar disk where bundles of magneticfield lines break through the surface. A puzzling phenomenon was first noted by J. Evershed in 1909: spectroscopic observations of sunspots show a flow of material streaming across the face of the spot, only to perform a mysterious vanishing act at its outer edge. It turns out that the material is dragged back under the solar surface along closed loops in the magnetic field.

Date: 1997
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DOI: 10.1038/37883

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