Observations of the solar flare of May 7, 1980 using several Solar Maximum Mission instruments are presented as an investigation of the phenomenon of chromospheric evaporation. The total amount of plasma at temperatures greater than 2 x 10 to the 6th K were determined from the X-ray data, and the amount of plasma that was evaporated from the chromosphere was determined from the H-alpha data. The H-alpha profiles indicate that for the flare as a whole, at the time of peak soft X-ray emission measure, the number of atoms evaporated from the chromosphere was 7 x 10 to the 37th. The soft X-ray emission measure of 1 x 10 to the 49th/cu cm, coupled with the flare volume estimate of 10 to the 26th cu cm, indicates that there were 3 x 10 to the 37th electrons in the soft X-ray plasma with temperatures greater than 2 x 10 to the 6th K. These results indicate that enough material had been evaporated from the chromosphere to account for the X-ray plasma. Taken together, the H-alpha, soft X-ray, and hard X-ray images indicate that chromospheric evaporation is driven both by flare-accelerated electrons during the impulsive phase and by conduction during the thermal phase.


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    Titel :

    Direct evidence for chromospheric evaporation in a well-observed compact flare


    Beteiligte:
    Canfield, R. C. (Autor:in) / Gunkler, T. A. (Autor:in) / Hudson, H. S. (Autor:in) / Acton, L. W. (Autor:in) / Leibacher, J. W. (Autor:in) / Kiplinger, A. L. (Autor:in)

    Erscheinungsdatum :

    1982-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Direct evidence for chromospheric evaporation in a well-observed compact flare

    Canfield, R.C. / Gunkler, T.A. / Hudson, H.S. et al. | Elsevier | 1983


    Evidence for explosive chromospheric evaporation in a solar flare observed with SMM

    Zarro, D. M. / Saba, J. L. R. / Strong, K. T. et al. | NTRS | 1986



    H and X-Ray Signatures of Chromospheric Evaporation Observed during the Early Phase of the 15 November 1991 Flare

    Wuelser, J.-P. / Canfield, R. C. / Acton, L. W. et al. | British Library Conference Proceedings | 1994