Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265..290b&link_type=abstract
Astrophysical Journal, Part 1, vol. 265, Feb. 1, 1983, p. 290-294. Research supported by the Nederlandse Organisatie voor Zuive
Astronomy and Astrophysics
Astronomy
26
Infrared Astronomy, Infrared Radiation, Main Sequence Stars, Stellar Radiation, Stellar Spectra, Astronomical Spectroscopy, Cosmic Dust, Fluorescence, Formaldehyde, Molecular Excitation, Optical Pumping, Stellar Envelopes
Scientific paper
The spectrum of HD 97048 has been measured with a resolving power of 450 between 3.37 and 3.64 μm. The prominent feature near 3.5 μm, discovered by Blades and Whittet, is well resolved, with a peak at 3.53 μm and a wing extending to shorter wavelength. The weaker feature near 3.4 μm is found to peak at 3.43 μm, in contrast to the 3.40 μm feature seen in other astronomical objects. The observed spectrum strongly resembles laboratory spectra of mixtures of monomeric and dimeric formaldehyde embedded in low-temperature solids. Of various possible excitation mechanisms, ultraviolet pumped infrared fluorescence of formaldehyde in interstellar grains provides the best explanation for the observed spectrum.
Allamandola Louis J.
Baas F.
Geballe Thomas Ronald
Lacy John H.
Persson Eric S.
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