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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    Titel :

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


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

    Erschienen in:

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


    Erscheinungsdatum :

    01.01.1993


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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