Abstract
SPECTRA of two great chromospheric flares taken by the flare spectrograph at Ondřejov1 show an evident splitting of the D 1 emission line of Na I which is attributed to a magnetic field existing in that part of the chromosphere where the sodium lines are formed. This explanation is supported by the following facts :
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References
Valníček, B., Letfus, V., Blaha, M., Švestka, Z., and Seidl, Z., Bull. Astro. Inst. Czech., 10, 149 (1959).
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Švestka, Z., Bull. Astro. Inst. Czech. (in the press).
Severny, A. B., and Bumba, V., The Observatory, 78, 33 (1958).
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BLAHA, M., KOPECKÝ, M. & ŠVESTKA, Z. Measurement of Magnetic Fields in Chromospheric Flares. Nature 187, 224–225 (1960). https://doi.org/10.1038/187224a0
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DOI: https://doi.org/10.1038/187224a0
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