Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315l.341e&link_type=abstract
Astronomy and Astrophysics, v.315, p.L341-L344
Astronomy and Astrophysics
Astrophysics
51
Ism: Molecules, Dust, Infrared: Interstellar: Lines
Scientific paper
We present laboratory measured infrared spectra of mixtures containing CO and CO_2_ at low temperatures. The profiles and peak position of the absorption features due to these species are very sensitive to molecular environment, temperature, irradiation history and particle shape. Illustrative examples of these variations are briefly discussed. We have compiled datafiles containing the laboratory spectra, derived optical constants, as well as extinction efficiency calculations for small grains. These files can be retrieved from the WWW in various formats after November 1st, 1996, under http://www.strw.leidenuniv.nl/~ehrenfreund/isodb. Together with astronomical spectra taken by the ISO satellite these laboratory data will be valuable for the determination of the grain mantle composition and grain evolution in dense clouds.
Boogert Abraham C. A.
Ehrenfreund Pascale
Gerakines Perry A.
Jansen David J.
Schutte Willem A.
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