Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...145..262v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 145, no. 1, April 1985, p. 262-268. Research supported by the U.S. National Re
Astronomy and Astrophysics
Astronomy
16
Early Stars, Emission Spectra, Infrared Spectra, Pre-Main Sequence Stars, Stellar Envelopes, Stellar Spectrophotometry, Fluorescence, Formaldehyde, Grain Size, Molecular Clouds, Optical Pumping, Planetary Nebulae, Raman Spectra, Thermal Emission, Ultraviolet Astronomy
Scientific paper
This paper presents the results of a laboratory study of formaldehyde (H2CO) suspended in low temperature molecular matrices with compositions similar to what may be found in the "dirty ice" mantles of grains. It is shown that the emission features near 3.5 μm in the pre-main-sequence star HD 97048 can be matched by a mixture of chemical complexes of H2CO with surrounding molecules in the grain. Furthermore, a discussion is presented of various possible excitation mechanisms for this emission. The conclusion is, that for the features near 3.5 μm in HD 97048, UV pumped IR fluorescence is the most likely mechanism.
Allamandola Louis J.
Baas F.
Greenberg Mayo J.
van der Zwet G. P.
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