Abstract
Profiles of C iii λ1909 and Si iii λ1892 obtained on and near the limb during the 1976 flight of the University of Hawaii echelle rocket spectrograph were reduced and analyzed to determine electron densities and mass motions. The electron pressure derived (N eTe ∼ 4 × 1015 cm−3) agrees well with that determined by Cook and Nicolas (1979) from ATM data. Nonthermal velocities in the region of formation of Si iii λ1892 on the disk were found to be ∼ 10–12 km s−1, somewhat lower than the values obtained by Doschek et al. (1976), also from ATM spectra. However, velocities derived at and above the limb were in closer agreement, about 17 km s−1.
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References
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Geosciences Systems Department, Computer Sciences Corporation, 8728 Colesville Road, Silver Spring, Md. 20910, U.S.A.
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Allen, M.S. Echelle observations of C iii λ1909 and Si iii λ1892. Sol Phys 64, 71–75 (1979). https://doi.org/10.1007/BF00151116
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DOI: https://doi.org/10.1007/BF00151116