Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...208..307i&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 208, no. 1-2, Jan. 1989, p. 307-313.
Astronomy and Astrophysics
Astrophysics
19
Iron, Line Spectra, Magnetoactivity, Photosphere, Solar Magnetic Field, Brightness Distribution, Calcium, Doppler Effect, Emissivity, Field Strength, Spectral Line Width
Scientific paper
Spectra of the magnetic insensitive line Fe I 5576.1 A from one of the most active regions of the last solar cycle are used to study the influence of varying magnetic field strength on the convective structure of the photosheric layers. A simplified heuristic model is constructed for the modified convective structure of the solar granulation within active regions. The photospheric atmosphere is divided into upstreaming granular, downstreaming intergranular, and state filigree columns. The observations are best reproduced by a restricted granular upflow, accompanied by increasing surface density of filigree elements in plage regions of increasing Ca(+)-brightness.
Immerschitt S.
Schroeter E. H.
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