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On peculiarities of the H and K Ca ii lines of quiescent prominences
Authors:N N Morozhenko
Institution:(1) The Main Astronomical Observatory of the Ukrainian Academy of Sciences, Kiev, U.S.S.R.
Abstract:A study of the metallic lines in bright quiescent prominences indicates that the optical thickness in the K line of Ca ii may reach values as high as 103. This is about 10 times larger than the optical thickness in the Hagr line and may explain some peculiarities of the H and K lines in solar prominences.
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