Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...140..112n&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 140, no. 1, Nov. 1984, p. 112-118.
Astronomy and Astrophysics
Astrophysics
18
Magnetic Signatures, Solar Magnetic Field, Solar Prominences, Doppler Effect, H Alpha Line, Polarization Characteristics, Spectral Line Width, Visible Spectrum, Zeeman Effect
Scientific paper
Analysis of the longitudinal field strength in prominences obtained by measurements of Zeeman polarization in HeD3, Hα, and Hβ is presented. The measurements were performed with the spectrally scanning magnetograph installed at the 53 cm coronograph of the Kislovodsk high altitude station. The observations allow to correlate the values of the equivalent widths and those of the half widths with magnetographic data. No systematic dependence of field strengths on line widths is found. High field strengths persist for large Doppler shifts and low emissions. In the histogram showing the distribution of observed field strengths two peaks near B∥ ≅ 8 Gauss and B∥ ≅ 20 Gauss appear. The second peak corresponds to prominences mainly related to active regions for latitudes <±35°. A similar distribution is obtained from a set of data deduced from observation of the Hanle effect and corresponding to the same epoch.
Kim Seong-Il
Koutchmy Serge
Nikolsky G. M.
Stellmacher Goetz
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