Abstract
A study has been made of fine structure wavelength shift in the K line spectra from quiescent prominences. A persistent small scale motion is found in the prominence main body. In places where we see the characteristic thread like fine structure in the accompanying Hα filtergrams the average line-of-sight velocity amplitude is about 1 km s−1. A higher velocity (≈ 4 km s−1) is associated with a slightly coarser, mottled prominence fine structure. In the low lying regions, connecting the prominence body and the chromosphere, we do not detect any fine structure line shift (v ⩽ 1/2 km s−1).
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Engvold, O. The internal motion of quiescent prominences. Sol Phys 23, 346–352 (1972). https://doi.org/10.1007/BF00148098
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DOI: https://doi.org/10.1007/BF00148098