The photodissociation of CO in circumstellar envelopes
1988; IOP Publishing; Volume: 328; Linguagem: Inglês
10.1086/166338
ISSN1538-4357
AutoresG. A. Mamon, A. E. Glassgold, P. J. Huggins,
Tópico(s)Atmospheric Ozone and Climate
Resumoview Abstract Citations (279) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Photodissociation of CO in Circumstellar Envelopes Mamon, G. A. ; Glassgold, A. E. ; Huggins, P. J. Abstract The CO photodissociation rate for the unshielded ISM is calculated using recent laboratory results which confirm that photodissociation occurs by way of line absorption. A value of 2.0 x 10 to the -10th/s, an order of magnitude higher than the rate used in the past, is obtained. The new rate and a treatment of the radiative transfer and shielding are used to develop a theory for the CO abundance in the circumstellar envelopes of cool, evolved stars, and results are presented on the spatial variation of CO, C, and C(+). It is shown that these distributions play important roles in determining the observational properties of circumstellar envelopes. Publication: The Astrophysical Journal Pub Date: May 1988 DOI: 10.1086/166338 Bibcode: 1988ApJ...328..797M Keywords: Carbon Monoxide; Cool Stars; Interstellar Matter; Photodissociation; Stellar Envelopes; Carbon Isotopes; Ionization Cross Sections; Molecular Gases; Radiative Heat Transfer; Spectral Bands; Astrophysics; MOLECULAR PROCESSES; STARS: CIRCUMSTELLAR SHELLS full text sources ADS | data products SIMBAD (2)
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