Abstract In various models of interstellar grain chemistry, solid O2 is formed by accretion as well as by surface reactions on grains. In dense molecular cloud models, at a later stage of the evolution, the O2 molecule may become a substantial grain mantle constituent. Since IR dipole vibrational transitions for the homonuclear diatomic molecule O2 are forbidden, the abundance of this potentially important grain mantle component can not be determined. However, embedded in a dirty ice matrix, the fundamental vibration of O2 at ∼ 1550 cm−1 becomes observable at 10 K, due to interactions with surrounding molecules, which break the symmetry of molecular oxygen. This process might be applicable for the dust mantle environment of interstellar grains. We have studied the role of solid O2 and O3 in astrophysically relevant ice mixtures and discuss the possible detection of solid O2 and its major photolysis product O3 in interstellar grains, in dense molecular clouds. Both molecules represent a specific target to be observed by the ISO satellite in the near future.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    On the possible detection of solid O2 and O3 interstellar grains with ISO


    Beteiligte:
    Ehrenfreund, P. (Autor:in) / Burgdorf, M. (Autor:in) / d'Hendecourt, L. (Autor:in) / Greenberg, J.M. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 13 , 12 ; 465-471


    Erscheinungsdatum :

    1993-01-01


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    On the Possible Detection of Solid O~2 and O~3 Interstellar Grains with ISO

    Ehrenfreund, P. / Burgdorf, M. / D'Hendecourt, L. et al. | British Library Conference Proceedings | 1993


    Spectroscopic studies of interstellar grains

    Johnson, Fred M. | TIBKAT | 1970



    Is interstellar archeology possible?

    Carrigan, Richard A. Jr. | Elsevier | 2011