Abstract We report the discovery of two hot white dwarfs which have the lowest line-of-sight neutral hydrogen column densities yet measured. The stars were found independently by the ROSAT EUV, Montreal-Cambridge-Tololo, and Edinburgh-Cape surveys. Follow-up observations made using the Voyager 2 ultraviolet spectrometer reveal strong continua shortward of the 912Å Lyman limit from which we deduce that the neutral hydrogen column densities are 1.3 × 1017 and 2.0 × 1017 atoms cm −2.


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    Title :

    Two new hot white dwarfs in a region of exceptionally low hi density


    Contributors:
    Barstow, M.A. (author) / Wesemael, F. (author) / Holberg, J.B. (author) / Werner, K. (author) / Buckley, D.A.H. (author) / Stobie, R.S. (author) / Fontaine, G. (author) / Rosen, S.R. (author) / Demers, S. (author) / Lamontagne, R. (author)

    Published in:

    Advances in Space Research ; 13 , 12 ; 281-285


    Publication date :

    1993-01-01


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Two New Hot White Dwarfs in a Region of Exceptionally Low HI Density

    Barstow, M. A. / Wesemael, F. / Holberg, J. B. et al. | British Library Conference Proceedings | 1993


    Two new hot white dwarfs in a region of exceptionally low hi density

    Barstow, M. A. / Wesemael, F. / Holberg, J. B. et al. | NTRS | 1993



    White dwarfs

    Barstow, M.A. | Elsevier | 1991


    White Dwarfs Observed by Hipparcos

    Vauclair, G. / Schmidt, H. / Koester, D. et al. | British Library Online Contents | 1997