Discussion on the Corona

  • R. Lüst
  • D. J. Faulkner
  • M. De Groot
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 2)


Thomas. The equation used by Seaton for the emission in the UV lines actually has implicit in it two assumptions not mentioned by Seaton. The equation assumes that each collisional excitation results in a photon escaping from the atmosphere in that transition. This is true only if: (1) the atom is a two-level atom; i.e. the transition considered may be so represented; (2) either (a) no radiation field builds up in the line, or (b) if a radiation field builds up, the atmosphere is symmetric about its mid-plane so the same emission escapes from both top and bottom. Both these assumptions must be checked in detail. Charlotte Pecker and I had tried to investigate both in some circumstances (Astrophys. J. 1963) but the work is only exploratory. However one should realize that he makes these assumptions, when he asks the validity of his results.


Solar Wind Gravitational Wave Oscillator Strength Coronal Structure Magnetic Part 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Allen, C. W. and Corliss, C. H.: 1963, Mon. Not. Roy. Astron. Soc. 126, 37.ADSGoogle Scholar
  2. Garstang, R. H.: 1962a, Ann. Astrophys. 25, 109.ADSGoogle Scholar
  3. Garstang, R. H.: 1962b, Comm. Univ. London Obs. 57.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1965

Authors and Affiliations

  • R. Lüst
    • 1
  • D. J. Faulkner
    • 2
  • M. De Groot
    • 3
  1. 1.Max Planck Institut für AstrophysikMünchenGermany
  2. 2.Mt. StromloAustralia
  3. 3.Sterrewacht ‘Sonnenborgh’UtrechtThe Netherlands

Personalised recommendations