Abstract
view Abstract Citations (38) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the chemisputtering of interstellar graphite grains. Draine, B. T. Abstract The rate of erosion of interstellar graphite grains as a result of chemical reaction with H, N, and O is estimated by using the available experimental evidence. It is argued that 'chemical sputtering' yields for interstellar graphite grains will be much less than unity, contrary to earlier estimates by Barlow and Silk (1977). Chemical sputtering of graphite grains in evolving H II regions is found to be unimportant, except in extremely compact (hydrogen densities at least about 100,000 per cu cm) H II regions. Alternative explanations are considered for the apparent weakness of the 2175-A extinction 'bump' in the direction of several early-type stars. Publication: The Astrophysical Journal Pub Date: May 1979 DOI: 10.1086/157066 Bibcode: 1979ApJ...230..106D Keywords: Granular Materials; Graphite; Interstellar Chemistry; Interstellar Matter; Sputtering; Cosmic Dust; H Ii Regions; Hydrogen Atoms; Methane; Astrophysics; H II Regions:Molecular Processes full text sources ADS |
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