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Observed coronal temperatures at 1.37R⊙in the region of a helmet structure

✍ Scribed by D. H. Liebenberg; R. J. Bessey; B. Watson

Publisher: Springer
Year: 1975
Tongue: English
Weight: 545 KB
Volume: 40
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00162385

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✦ Synopsis

During the total solar eclipse, 1965 May 30, a 25 cm aperture f/8.0 telescope and Fabry-Perot interferometer were operated aboard the USAF-AEC aircraft. High resolution spectra of the Fe xIv emission line, 530.3 nm, were obtained. Deconvolved intensity vs wavelength profiles of the second order fringe overlay a helmet structure on the NM limb at out to 1.37 R| The profiles yield coronal temperatures, absolute intensities and Doppler velocities in regions of apparently open magnetic field structure and within the closed field lines of the helmet. Together with white light intensities the observations are interpreted to provide temperatures and turbulent velocities in and around this coronal structure. Comparison is made with a model by Billings and Roberts. We suggest a model with radial flow (solar wind) velocities of ~ 60 km s -1 satisfies the observations in the open field line region.

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