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X-ray VS Heii λ1640 Å correlation of II Peg

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The Heii λ1640 Å emission feature on the IUE spectra of II Peg has been compared with the observed X-ray flux. The atmospheric activity level is determined by comparing the several diagnostic line intensities with the solar case.

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Esendemir, A., Alev, H.M. X-ray VS Heii λ1640 Å correlation of II Peg. Astrophys Space Sci 197, 35–41 (1992).

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  • Line Intensity
  • Emission Feature
  • Atmospheric Activity
  • Solar Case
  • Diagnostic Line