The recent missions to Comet Halley detected large quantities of organic material on grains as well as organic molecules in the gas phase. A possible origin of these materials is the energetic processing of ice mantles on the grains prior to comet formation, either in the pre-solar nebula or the interstellar medium. This process was simulated in the laboratory by depositing interstellar ice analogs (H2O/CH3OH/CO/NH3) on a cold (10 K) substrate with simultaneous UV irradiation. The material evaporating during warm-up of the photolyzed ice as well as the residue remaining at room temperature was analyzed by a number of techniques. It was found that a large number of organic molecules of various complexity are synthesized during the simulation process, stressing the possible significance of UV photolysis for producing the organic Comet material.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Laboratory simulation of the photoprocessing and warm-up of cometary and pre-cometary ices - Production and analysis of complex organic molecules


    Contributors:

    Published in:

    Publication date :

    1992-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :



    Complex Organics in Laboratory Simulations of Interstellar/Cometary Ices

    Bernstein, M. P. / Allamandola, L. J. / Sandford, S. A. et al. | British Library Conference Proceedings | 1997


    Interstellar and Cometary Ices: Molecular Emission from Comet Hale-Bopp

    Irvine, W. M. / DeVries, C. H. / Dickens, J. E. et al. | British Library Online Contents | 1997