Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...205..278c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 205, no. 1-2, Oct. 1988, p. 278-288. Research supported by the Universita di F
Astronomy and Astrophysics
Astrophysics
17
Line Spectra, Photosphere, Solar Limb, Solar Magnetic Field, Solar Spectra, Convective Flow, Doppler Effect, Magnetic Field Configurations, Solar Activity, Solar Granulation
Scientific paper
Some photospheric lines have been observed in active regions at different distances from the solar disk center. Assuming that the line weakening monotonically changes with the changing of the magnetic field intensity, it is established for the observed lines how the line width, line asymmetry and line shift vary with the magnetic field. In particular, near the disk center, an increasing red-shift of the higher part of the lines is observed with the increasing of the field, while, at the bottom of a strong line, a small blue-shift is observed. These results may be interpreted as due to the fading of the convection in active regions produced by the magnetic field.
Cavallini Fabio
Ceppatelli Guido
Righini Alberto
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