Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191..641m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 191, June 1980, p. 641-649. Research supported by the Science Research
Astronomy and Astrophysics
Astronomy
9
Astronomical Photometry, Cosmic Dust, Infrared Astronomy, Interstellar Matter, Spectrophotometry, Amorphous Materials, Astronomical Models, Astronomical Spectroscopy, Curve Fitting, Mathematical Models
Scientific paper
It is argued that the surprising constancy of the interstellar 10-micron feature, as evidenced both by observations and by theoretical best-fit model calculations, can be used to put some constraint on the nature of interstellar dust. In particular, it is shown that the feature is not produced by crystalline particles and that any amorphous material capable of producing the band must be able to avoid recrystallization to temperatures of at least 1000 K. Observations of the interstellar 18-micron feature are also used to constrain the dust models. The most important dust models proposed to date are critically reviewed in the light of the infrared spectrophotometry and it is concluded that the infrared features could be due to a small number of distinct chemical species rather than amorphous silicates.
Duley Walter W.
Millar Thomas J.
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