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- W2023380946 abstract "view Abstract Citations (200) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Abundance of atomic carbon /C I/ in dense interstellar clouds Phillips, T. G. ; Huggins, P. J. Abstract The abundance of interstellar neutral atomic carbon is investigated by means of its ground state fine-structure line emission at 492 GHz using the 91.5 cm telescope of NASAs Kuiper Airborne Observatory. Atomic carbon is found to be very abundant in dense interstellar molecular clouds with column densities of about 10 to the 19th per sq cm. Because the observations have considerably greater column densities than current theories of carbon chemistry, it is suggested that the physical conditions of these clouds are not as simple as assumed in the models. Various situations are discussed which would lead to large C I abundances, including the possibility that the chemical lifetimes of the clouds are relatively short. Publication: The Astrophysical Journal Pub Date: December 1981 DOI: 10.1086/159494 Bibcode: 1981ApJ...251..533P Keywords: Abundance; Carbon; Gas Density; Interstellar Gas; Line Spectra; Molecular Clouds; Astronomical Models; Carbon Compounds; Fine Structure; Infrared Spectra; Interstellar Chemistry; Molecular Spectra; Optical Thickness; Astrophysics full text sources ADS |" @default.
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- W2023380946 title "Abundance of atomic carbon /C I/ in dense interstellar clouds" @default.
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