New constraints on the formation of the helium lines

We analyse observations of the helium lines obtained with CDS onboard SOHO. The He I 584.3 Angstrom/O III intensity ratio shows a lower limit and an upper limit that decrease with increasing 0 in intensity. At low O III intensities this ratio increases significantly. An upper limit arises naturally...

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Main Authors: Houdebine, E, Smith, G, Jordan, C
Formato: Conference item
Publicado em: 2003