Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334..803c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 15, 1988, p. 803-814.
Astronomy and Astrophysics
Astrophysics
50
Carbon Isotopes, Infrared Spectra, Molecular Clouds, Photoionization, Reflection Nebulae, Carbon Monoxide, Far Infrared Radiation, Fine Structure, Interstellar Gas
Scientific paper
The authors have observed emission in the far infrared fine-structure lines of O I (63 μm) and C II (158 μm) from the bright optical reflection nebula NGC 7023. They interpret this emission as arising in a warm, atomic photodissociation region produced by the interaction of the ultraviolet radiation of the illuminating star with a molecular cloud. The far-infrared line observations are combined with 12CO and 13CO observations to estimate the density and the temperature in the photodissociation region and in the adjacent molecular cloud and to construct a detailed model for the photodissociation region in NGC 7023.
Castelaz Michael W.
Chokshi Arati
Tielens Alexander G. G. M.
Werner Michael W.
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