Physics
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986soph..106...95h&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 106, July 1986, p. 95-106.
Physics
1
Solar Corona, Solar Eclipses, Solar Limb, Stellar Spectrophotometry, Vertical Distribution, Electron Density (Concentration), Electron Energy, Iron
Scientific paper
Slitless flash spectrograms in heights below 8000 km above the solar limb were obtained by the University of Kyoto expedition at Atar, Mauritania. The integrated intensities of Fe XIV, Fe X, Fe XI, and the continuum are measured as a function of height above the solar limb at 11 points around the third contact point. It is found that a significant amount of the emission in Fe X originates in chromospheric levels well below 8000 km. This implies that the interspicular region of the chromosphere is occupied by coronal material. The average values of the electron temperature (0.9-1.1 million K) and the electron density in the interspicular region are derived from the Fe X and the Fe XI intensities (0.9-1 billion/cu cm) on the assumption of spherical symmetry. The intensity variations of the coronal lines and the continuum with position angle are also studied. Strong correlations between Fe XIV and the continuum and between Fe X and Fe XI are found. The Fe X intensities indicate a density fluctuation in the innermost corona by at least a factor of two.
Hanaoka Yoichiro
Kanno Mitsuo
Kurokawa Hiroki
Tsubaki Tokio
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