Abstract
Emission lines of the Balmer series, D3 and H and K are reported present on a coronal spectrogram obtained at the March 7, 1970 eclipse. Arguments are presented to show that these could not have originated from scattering in the Earth's atmosphere and hence possibly have a coronal origin.
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Bappu, M.K.V., Bhattacharyya, J.C. & Sivaraman, K.R. On emission lines of hydrogen, helium and ionized calcium seen on a coronal spectrogram of the March 7, 1970 eclipse. Sol Phys 26, 366–369 (1972). https://doi.org/10.1007/BF00165277
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DOI: https://doi.org/10.1007/BF00165277