Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.125..331r&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 125, no. 2, Aug. 1986, p. 331-339. SERC-supported research.
Astronomy and Astrophysics
Astrophysics
9
Cavities, Graphite, Interstellar Extinction, Interstellar Matter, Molecular Spectra, Ultraviolet Spectra, Absorption Spectra, Refractivity
Scientific paper
A computer routine using rigorous Güttler theory was developed to consider effects of concentric cavities and organic mantles within and around graphite spheres, with a view to assessing the stability of the extinction peak near 4.60 μm-1. The newly discovered stable carbon molecule of 60 atoms gives an absorption band at ≡4.60 μm-1 which closely agrees with the observed; moreover, it leads to the observed extinction rise in the far UV and can possibly explain the fine structure around the 5.5 - 7 μm-1 dip, while its own structure deals successfully with the main objections to previous carbon-graphite models. The role of the electric vector component perpendicular to the basal plane of the crystal in achieving the fit is stressed.
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