Physics
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...68...49g&link_type=abstract
Solar Physics, vol. 68, Nov. 1980, p. 49-69.
Physics
125
Magnetic Field Configurations, Solar Atmosphere, Solar Granulation, Solar Magnetic Field, Acoustic Propagation, Chromosphere, Magnetic Recording, Magnetometers, Solar Physics
Scientific paper
Magnetograms in lines originating high in the solar atmosphere show that, away from the disk center, active regions and plagettes exhibit diffuse fringes of reverse polarity on the limbward side and diffuse centerward extensions of normal polarity. These are interpreted as due to the fields opening out with height. The analysis of a b2 magnetogram shows that, in active regions, the fields cover supergranules completely at heights mostly below 500-600 km (zero height being at tauc = 1), but with heights possibly up to 700 or 800 km at great distances from the network; these levels are much lower than the characteristic 1500 km usually accepted. For plagettes, the low-lying canopy is not measurable beyond typically 6000-7000 km from the network. The fields permeate the chromosphere fully above the level of the average temperature minimum.
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