Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985azh....62.1147n&link_type=abstract
(Astronomicheskii Zhurnal, vol. 62, Nov.-Dec. 1985, p. 1147-1153) Soviet Astronomy (ISSN 0038-5301), vol. 29, Nov.-Dec. 1985, p.
Astronomy and Astrophysics
Astronomy
Magnetic Flux, Magnetic Measurement, Solar Magnetic Field, Solar Prominences, Calibrating, Circular Polarization, Fabry-Perot Interferometers, Histograms, Line Shape, Solar Activity, Zeeman Effect
Scientific paper
Measurements of magnetic fields in solar prominences on the basis of the Zeeman effect are described. The circular polarization along the entire line profile is recorded. The spectral scanning is done with a Fabry-Perot interferometer and the modulation is done with a lithium niobate crystal. The influence of the instrumental characteristics on the measurements is discussed. A histogram of the frequency of appearance of longitudinal fields with a spatial resolution of 6-8 arcsec for prominences of 1979-1982 has clear maxima at 8 and 20 G. The peak at 20 G corresponds to prominences of active latitudes (less than + or - 35 deg) for which the angle beta between the long axis of the filament and the line of sight was close to 25 deg. From a comparison with the results measurement of the total field vector (data of Athay et al.) for prominences of the same epoch (1979-1981) the following conclusion is drawn about the field orientation: For prominences of active latitudes B parallel about = B; i.e., the angle between the long axis of a filament and the line of sight is close to the angle between the long axis of the filament and the magnetic field vector.
Kim Seong-Il
Koutchmy Serge
Nikolskij G. M.
Stepanov I. A.
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