Abstract Using spectra from the Bragg Crystal Spectrometer on Yohkoh we have derived coronal abundances of sulphur, calcium and iron during several flares from the ratio of the flux in the resonance line to the nearby continuum. Multi-thermal effects have been taken into account using differential emission measure analysis. We have also determined the abundance of S in cool active regions during a period of very low solar activity. We compare the coronal abundances of S, Ca and Fe with their photospheric values.


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    Title :

    Determination of coronal abundances of sulphur, calcium and iron using the yohkoh bragg crystal spectrometer


    Contributors:
    Fludra, A. (author) / Culhane, J.L. (author) / Bentley, R.D. (author) / Doschek, G.A. (author) / Hiei, E. (author) / Phillips, K.J.H. (author) / Sterling, A. (author) / Watanabe, T. (author)

    Published in:

    Advances in Space Research ; 13 , 9 ; 395-398


    Publication date :

    1993-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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