The Temperature of the Low Corona During Solar Cycles 21–23

  title={The Temperature of the Low Corona During Solar Cycles 21–23},
  author={Richard Charles Altrock},
  journal={Solar Physics},
  • R. Altrock
  • Published 1 October 2004
  • Physics, Environmental Science
  • Solar Physics
AbstractObservations of the forbidden coronal lines Fe xiv 530.3 nm and Fe x 637.4 nm obtained at the National Solar Observatory at Sacramento Peak are used to determine the variation of coronal temperature at latitudes above 30∘ during solar activity cycles 21–23. Features of the long-term variation of emission in the two lines are also discussed. Temperatures at latitudes below 30∘ are not studied because the technique used to determine the coronal temperature is not applicable in active… 
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Solar Corona Photoelectric Photometer Using Mica Etalons
  • R. Smartt
  • Physics
    Astronomical Telescopes and Instrumentation
  • 1982
A solar corona photoelectric photometer has been constructed that operates at the three coronal lines, Fe XIV (5302.9 Å), Ca XV (5694.5 Å) and Fe X (6374.5 Å), using mica etalons and narrow-band