Absorption spectrum of the CO molecule and its isotopomers between 91.2 and 115.2 nm
ABSTRACK
M.Eidelsberg
1, J.J Benayoun
2, Y. Viala
3 and F.Rostas
1
1 Observatoire de Paris-Meudon LERMA CNRS,F-92195 Meudon Cedex, France
2 Observatoire de Grenoble, Groupe d'Astrophysique et URA 708 du CNRS, CERMO BP 53X,F-38041 Grenoble Cedex, France
3 Observatoire de Paris-Meudon GEPI CNRS, -92195 Meudon Cedex, France
Received January 2; accepted February 25, 1991
Abstract. - Based on the data on the CO molecule recently obtained by Eidelsberg an Rostas (1990), this paper present a complete atlas of the UV absoption lines of the four main isotopes:
12C
16O,
13C
16O,
12C
18O and
13C
18O
in the wavelength range 91.2 – 115.2 nm.
The results are displayed in
tables which contain the parameters of the absorption bands as wellasthe
wavenumber and the wavelength of each line either observed or computed from the
rotational constants of the upper electronic Rydberg state. Besides these
spectroscopic data, for each transition, the absorpton oscillator strength, the
lifetime of the upper electronic state and its dissociation probability are
also given.
The set of data , which can be useful to compute the
photodissociation rate and the abundance of CO in various astrophysical
environments is available upon request, on computer compatible media. The
synthetic absorption spectrum of
12C
16O in the range 91.2
– 115.2 nm, calculated for a temperature of 50 K by assuming a Boltzmann
distribution of the rotational levels, is presented in a graphic form.
Key words : atomic and molecular data - atomic and molecular processes - interstellar medium: molecules - spectroscopy.
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