Surface activity of interstellar grains - Adsorbed molecular ions and the diffuse interstellar bands

Details Surface activity of interstellar grains - Adsorbed molecular ions and the diffuse interstellar bands Surface activity of interstellar grains - Adsorbed molecular ions and the diffuse interstellar bands

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...211l.145d&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 211, Feb. 1, 1977, p. L145-L148. Research supported by the National

Astronomy and Astrophysics

Astrophysics

26

Chemical Evolution, Interstellar Matter, Molecular Ions, Spectral Bands, Adsorption, Astronomical Spectroscopy, Silicates, Surface Reactions

Scientific paper

The chemical activity of interstellar grain surfaces is discussed, and it is shown that likely interstellar grain materials will possess surface sites with acidic and basic character. This hypothesis has been tested experimentally in a spectroscopic study of benzene ions adsorbed on Ca, Mg, and Fe protosilicates in powder form. The possibility that certain of the diffuse interstellar absorption bands arise in transitions of adsorbed polyatomic molecular ions is examined. A spectral feature due to Fe(3+) in Fe protosilicates has been observed near 4430 A.

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