Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195..921a&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 195, June 1981, p. 921-930. Research supported by the Science Research
Astronomy and Astrophysics
Astronomy
34
Astronomical Spectroscopy, Hydrogen Clouds, Infrared Astronomy, Orion Nebula, Absorption Spectra, Astronomical Models, Luminosity, Silicates
Scientific paper
Infrared spectroscopic observations have been made with sufficient spatial resolution to separate some of the members of the BNKL infrared complex in the Orion Nebula; 8-13 micron spectra of BN, IRc2 and IRc4 together with 3-4 micron spectra of BN and IRc2 are presented. These spectra show significantly more extinction attributed to water ice to IRc2 than to BN, and the extinction attributed to silicate grains also increase in the sequence BN, IRc2 and IRc4. The silicate absorption feature observed in the case of IRc4 has a significantly different shape from that observed in most heavily obscured infrared sources, but this is shown to be a natural consequence of a large amount of absorbing material being close to the source of luminosity. These observations are interpreted in terms of independent sources of comparable luminosity situated progressively deeper within the Orion molecular cloud.
Aitken David K.
Jones Barbara
Roche Patrick F.
Spenser P. M.
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