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- W1616645858 abstract "The importance of the ‘‘continuum’’ emission has already been pointed out in several sources of high excitation (such as planetary nebulae) with the quantitative study of the emission bands at 7.7 and 11.3 μm with the IRAS/LRS spectra (Zavagno et al.). We present here a model of the observed continuum emission between 2 μm and 1 mm in the source NGC7027. We find evidences for the existence of a large emission band in the range 5–15 μm. This band is characteristic of amorphous carbon grains. Using the data given by Rouleau and Martin, we have been able to derive the extinction coefficient for three samples of such grains. With our model, we are able to reproduce the observed emission bump using amorphous carbon grains. It is then possible, for the first time, to know the exact contribution of the emission bands with respect to the continuum and, using the derived optical depth, to estimate the mass of carbon contained in amorphous carbon grains." @default.
- W1616645858 created "2016-06-24" @default.
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- W1616645858 date "1994-01-01" @default.
- W1616645858 modified "2023-09-23" @default.
- W1616645858 title "The mid infrared continuum in the planetary nebula NGC 7027: Evidence for the presence of amorphous carbon grains" @default.
- W1616645858 doi "https://doi.org/10.1063/1.46599" @default.
- W1616645858 hasPublicationYear "1994" @default.
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