A measurement of the non-thermal velocity in the low chromosphere |
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| Authors: | Richard C. Canfield |
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| Affiliation: | (1) Sacramento Peak Observatory, Air Force Cambridge Research Laboratories, 88349 Sunspot, New Mexico, U.S.A. |
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| Abstract: | I have determined horizontally averaged non-thermal velocities from Jensen and Orrall's (1963) observations of Doppler widths of weak rare-earth emission lines in the wings of H and K. Combining these results with previous rare-earth line results, I conclude that this velocity in the low chromosphere (300–600 km) is 2.0 ± 0.2 km/s, and changes little with height. |
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