AbstractMuch of modern. astrophysics is grounded on the observed chemical compositions of stars and the diffuse plasma that pervades the space between stars, galaxies and clusters of galaxies. X-ray and EUV spectra of the hot plasma in the outer atmospheres of stars have demonstrated that these environments are subject to chemical fractionation in which the abundances of elements can be enhanced and depleted by an order of magnitude or more. These coronal abundance anomalies are discussed and some of the physical mechanisms that might be responsible for producing them are examined. It is argued that coronal abundances can provide important new diagnostics on physical processes at work in solar and stellar coronae. It seems likely that other hot astrophysical plasmas will be subject to similar effects.


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    Titel :

    Chemical fractionation and abundances in coronal plasma


    Beteiligte:
    Drake, J.J. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 32 , 6 ; 945-954


    Erscheinungsdatum :

    2003-04-04


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Chemical Fractionation and Abundances in Coronal Plasma

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    Diagnostic methods for coronal abundances

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    Coronal Abundances Determined from Energetic Particles

    Reames, D.V. | Online Contents | 1995