AbstractSeveral gas phases coexist in the interstellar medium. Besides the cold neutral, the warm neutral, and the warm ionized gases, the existence of hot gas (3.105 - 106 K) has been revealed through different measurements. Highly ionized species, like SiIV, CIV, NV, OVI have been detected through absorption lines in the spectra of stars by UV satellites (Copernicus, IUE). No strong constraint has been derived on the value of the filling factor of this hot gas in the galactic disk. These absorption lines, together with recently detected CIV emission lines, indicate that the hot gas probably extends as far as 3 kpc above the galactic plane. In this picture, the sun seems to occuppy a very peculiar position in a local hot bubble (T_~106 K) depicted by the soft X-ray measurements.


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    Titel :

    The hot interstellar medium


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    1991-01-01


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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