Solar Physics

, Volume 98, Issue 2, pp 255–266 | Cite as

Analysis of a white-light flare spectrum

  • R. Boyer
  • M. E. Machado
  • D. M. Rust
  • P. Sotirovski


The continuum emission of an X1 flare on 26 March, 1970 observed close to the solar limb (N 05 E 64) was analyzed by a photometric determination of the contrast ΔI(λ)/I0(λ) in the wavelength range 3558–5920 Å. Two possible mechanisms for the emission were investigated, namely hydrogen Paschen and H continua. We show the unlikeness of the Paschen possibility and derive strong constraints on the temperature structure and energy deposition mechanism imposed by the H continuum process.

We conclude that the emission must have originated in deep atmospheric layers. The relevance of this result with respect to flare energy release and transport processes is also discussed.


Hydrogen Flare Wavelength Range Energy Release Transport Process 
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.


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Copyright information

© D. Reidel Publishing Company 1985

Authors and Affiliations

  • R. Boyer
    • 1
  • M. E. Machado
    • 1
    • 2
  • D. M. Rust
    • 1
    • 3
  • P. Sotirovski
    • 1
  1. 1.Observatoire de Paris, DASOPMeudon Principal CedexFrance
  2. 2.Observatorio de Fisica Cósmica - CNIESan MiguelArgentina
  3. 3.Applied Physics Laboratory, The Johns Hopkins UniversityLaurelU.S.A.

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