Neon and Oxygen Absolute Abundances in the Solar Corona

  title={Neon and Oxygen Absolute Abundances in the Solar Corona},
  author={Enrico Landi and Uri Feldman and George Alexander Doschek},
In the present work we use the UV spectrum of a solar flare observed with SOHO SUMER to measure the absolute abundance of Ne in the solar atmosphere. The measurement is carried out using the intensity ratio between the allowed 1s2s 3S1-1s2p 3P2 Ne IX line at 1248.28 A and the free-free continuum radiation observed close to the Ne IX line. We find a value of the absolute Ne abundance ANe = 8.11 ± 0.12, in agreement with previous estimates but substantially higher than the very recent estimate by… CONTINUE READING

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