Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221...63r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, July 1, 1986, p. 63-76.
Astronomy and Astrophysics
Astronomy
47
Astronomical Spectroscopy, Chemical Composition, Cosmic Dust, Emission Spectra, Infrared Spectra, Planetary Nebulae, Abundance, Continuous Spectra, Far Infrared Radiation, Infrared Astronomy Satellite, Spaceborne Astronomy
Scientific paper
Spectra between 8-13 microns of 15 planetary nebulae are presented. Those planetaries with strong continuum emission are classified according to their dust emission spectra as oxygen or carbon rich. The spectrum of NGC 6302 shows a very strong emission line at 7.65 microns, confirming the reality of the feature seen by the low-resolution spectrometer on IRAS. The data presented here bring the number of available 8-13-micron spectra to 49. The far-infrared properties of planetary nebulae are found to reflect the differences in the dust chemistry found from the 8-13-micron spectra. This dependence is clearly seen in color-color plots constructed from the IRAS data, so that the different grain materials seen in the 8-13 micron spectra also show differences in the dust emissivity at longer wavelengths.
Aitken David K.
Roche Patrick F.
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