A Measurement of the Non-Thermal Velocity in the Low Chromosphere
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.
- Publication:
-
Solar Physics
- Pub Date:
- November 1971
- DOI:
- 10.1007/BF00159755
- Bibcode:
- 1971SoPh...20..275C
- Keywords:
-
- Emission Line;
- Doppler Width;
- Line Result