Abstract The ROSAT data of the hot DA white dwarf HS1234+4811 were analyzed in the framework of three different assumptions for the structure of the white dwarf's atmosphere. It could be excluded that the star has a homogeneously mixed photosphere consisting of helium and hydrogen only, but from ROSAT observations alone it is not possible to decide if the object has a stratified atmosphere with an ultrathin hydrogen layer (M H ≈ 7 · 10−14 M ⊙) on top of the He envelope or if heavier elements are responsible for the absorption in the soft X-ray region.


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    Title :

    Analysis of the ROSAT pointed observation of the hot DA white dwarf HS1234+4811


    Contributors:
    Jordan, S. (author)

    Published in:

    Advances in Space Research ; 13 , 12 ; 319-322


    Publication date :

    1993-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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