Amorphous carbon and interstellar emission excesses

Details Amorphous carbon and interstellar emission excesses Amorphous carbon and interstellar emission excesses

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.234p..61d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 234, Oct. 1, 1988, p. 61P-65P. NSERC-supported research

Astronomy and Astrophysics

Astronomy

14

Amorphous Materials, Carbon, Cosmic Dust, Interstellar Radiation, Ring Galaxies, Galactic Clusters, Near Infrared Radiation, Radiation Distribution

Scientific paper

Chemical erosion of interstellar dust is found to eliminate PAH fragments with fewer than five rings, resulting in a relatively porous surface consisting primarily of compact clusters with five to eight rings. A thermal spike model indicates that nonequilibrium emission from such material should be observed throughout the infrared. The band gap of this material is found to be 2-2.5 eV for hydrogenated amorphous carbon and 0.9-1.25 eV for amorphous carbon dust, consistent with the assignment of extended red emission to luminescence by hydrogenated amorphous carbon and of the near-infrared emission to luminescence by amorphous carbon.

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