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Electron temperature and emission measure variations during solar X-ray flares

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Abstract

X-ray emission from seventeen X-ray flares was analyzed to obtain electron temperatures and emission measures associated with the source region in the solar corona. The source region was assumed to be isothermal with a Maxwellian electron velocity distribution.

Flares which were characterized by a rapid initial X-ray flux increase were found to also have a rapid initial rise in electron temperature and emission measure. Flares which were characterized by a gradual initial X-ray energy flux increase were found to have a less rapid initial rise in electron temperature and emission measure. In all X-ray flares studied the peak temperature chronologically preceded the peak X-ray flux and the peak flux never came after the peak emission measure.

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References

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Authors and Affiliations

  1. E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, D.C., U.S.A.

    D. M. Horan

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  1. D. M. Horan
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Based on a dissertation submitted to The Catholic University of America, Washington, D.C.

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Horan, D.M. Electron temperature and emission measure variations during solar X-ray flares. Sol Phys 21, 188–197 (1971). https://doi.org/10.1007/BF00155789

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  • DOI: https://doi.org/10.1007/BF00155789

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