X-rays spectroheliograms in lines of Mg xi and Mg xii
Identifieur interne : 005844 ( Main/Exploration ); précédent : 005843; suivant : 005845X-rays spectroheliograms in lines of Mg xi and Mg xii
Auteurs : C. Bonnelle [France] ; C. Senemaud [France] ; G. Senemaud [France] ; G. Chambe [France] ; M. Guionnet [France] ; J. C. Henoux [France] ; R. Michard [France]Source :
- Solar Physics [ 0038-0938 ] ; 1973-04-01.
Abstract
Abstract: Spectroheliograms in the Lα Mg xii line and in the Mg xi resonance (R) 1s 21 S 0-1s2p 1 P 1 line, intercombination (I) 1s 21 S 0-1s2p 3 P 1,2, line, and the forbidden (F) 1s 21 S 0-1s2s 3 S 1 line, have been obtained. Two Bragg crystal spectrometers were used mounted with mechanical collimators to obtain a spatial resolution of 1′ × 3′. The apparatus was launched on a sounding rocket on July 2nd, 1971. A particularly thorough study was made of the brightest active region (MC 11402). Variations in the F to I Mg xi line intensity ratio from one point to another in the active region did not reveal the presence of high electron densities. The observed intensities of the Mg xi R line, Mg xii Lα line and Mg x 1s 22s 2 S 1/2-1s2p 1 P 2s × × 2 P11/2, 3/2 S line are not well explained by an isothermal model. Good agreement between computed and observed intensities is obtained using the non-isothermal model proposed here.
Url:
DOI: 10.1007/BF00150812
Affiliations:
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<front><div type="abstract" xml:lang="en">Abstract: Spectroheliograms in the Lα Mg xii line and in the Mg xi resonance (R) 1s 21 S 0-1s2p 1 P 1 line, intercombination (I) 1s 21 S 0-1s2p 3 P 1,2, line, and the forbidden (F) 1s 21 S 0-1s2s 3 S 1 line, have been obtained. Two Bragg crystal spectrometers were used mounted with mechanical collimators to obtain a spatial resolution of 1′ × 3′. The apparatus was launched on a sounding rocket on July 2nd, 1971. A particularly thorough study was made of the brightest active region (MC 11402). Variations in the F to I Mg xi line intensity ratio from one point to another in the active region did not reveal the presence of high electron densities. The observed intensities of the Mg xi R line, Mg xii Lα line and Mg x 1s 22s 2 S 1/2-1s2p 1 P 2s × × 2 P11/2, 3/2 S line are not well explained by an isothermal model. Good agreement between computed and observed intensities is obtained using the non-isothermal model proposed here.</div>
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