Measuring electron density in coronal active regions
Identifieur interne : 005588 ( Main/Exploration ); précédent : 005587; suivant : 005589Measuring electron density in coronal active regions
Auteurs : J. C. Noëns [France] ; J. Pageault [France] ; G. Ratier [Pays-Bas]Source :
- Solar Physics [ 0038-0938 ] ; 1984-08-01.
Abstract
Abstract: In order to study the electron density at the scale of the most encountered structures in coronal active regions a new multichannel coronagraph associated with a photoelectric spectrograph is now used at the Pic-du-Midi Observatory. In its quasi-routine mode this instrument, which is described in this paper, works with a 30″ field aperture in a parallel manner with aK-polarimeter. On each observed region it obtains maps of intensities of theλ λ3388, 10747, and 10798 Å emission lines due to Fexiii ion. Each measurement point is associated with a quasi-simultaneous image of the emission corona structures viewed in the light of theλ5303 Å line of Fexiv. Three examples of observations are given and the capabilities are discussed. Measuring electron density in coronal active regions. II A multichannel photoelectric coronagraph with a photo-electric spectrograph and a reflex monitor atλ5303 Å.
Url:
DOI: 10.1007/BF00154813
Affiliations:
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<front><div type="abstract" xml:lang="en">Abstract: In order to study the electron density at the scale of the most encountered structures in coronal active regions a new multichannel coronagraph associated with a photoelectric spectrograph is now used at the Pic-du-Midi Observatory. In its quasi-routine mode this instrument, which is described in this paper, works with a 30″ field aperture in a parallel manner with aK-polarimeter. On each observed region it obtains maps of intensities of theλ λ3388, 10747, and 10798 Å emission lines due to Fexiii ion. Each measurement point is associated with a quasi-simultaneous image of the emission corona structures viewed in the light of theλ5303 Å line of Fexiv. Three examples of observations are given and the capabilities are discussed. Measuring electron density in coronal active regions. II A multichannel photoelectric coronagraph with a photo-electric spectrograph and a reflex monitor atλ5303 Å.</div>
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