Abstract
This paper uses bright Ca II K points as markers for isolated magnetic features in the underlying solar photosphere. Stokes V polarimetry in selected photospheric lines applied to a large number of Ca II K targets yield some average results: These magnetic features are 2 to 3 arcsec in diameter, dark at disk center and bright at the limb. Their magnetic field strength is typically 1400 G, with the field vertically oriented on average. Their magnetic filling factor is large (≈40%). The author’s targets share these properties with the magnetic knots introduced by Beckers and Schroeter (1968). It is therefore concluded that magnetic knots can be found anywhere on the solar disk and not only near active regions. These features may contribute significantly to the total solar magnetic flux. (29 Ref.)
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© 1998 Springer-Verlag Berlin Heidelberg
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Burkhardt, G. et al. (1998). Sun. In: Burkhardt, G., et al. Literature 1997, Part 1. Astronomy and Astrophysics Abstracts, vol 67. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-51758-7_9
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DOI: https://doi.org/10.1007/978-3-642-51758-7_9
Publisher Name: Springer, Berlin, Heidelberg
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