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A correlation between Balmer and soft X-ray emission from stellar and solar flares

  • C.J. Butler (a1), M. Rodono (a2) and B.H. Foing (a3)

Summary

Simultaneous optical spectroscopy and X-ray monitoring of stellar and solar flares shows that a well-defined linear correlation exists between the integrated and soft X-ray flux that extends over four orders of magnitude. The existence of this relationship implies a direct proportionality between the emission from the cooler and denser regions (T ≈ 104 K) responsible for Balmer lines and the emission from the hot plasma (T ≈ 107 K) responsible for soft X-rays. The consequences are considered for (a) several models which have been proposed for solar flares, and (b) the suggestion that the Balmer emission results from irradiation by soft X-rays.

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References

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A correlation between Balmer and soft X-ray emission from stellar and solar flares

  • C.J. Butler (a1), M. Rodono (a2) and B.H. Foing (a3)

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