A study of extreme carbon stars. I - Silicon carbide emission features

Astronomy and Astrophysics – Astronomy

Scientific paper

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Carbon Stars, Infrared Spectra, Silicon Carbides, Stellar Envelopes, Stellar Spectra, Black Body Radiation, Emission Spectra, Spectrum Analysis

Scientific paper

10-μm spectra of many extreme carbon stars reveal a prominent emission feature near 11 μm. This is compared with laboratory spectra of SiC grains. Two distinct types of features are found, perhaps indicative of different mechanisms of grain formation in different stars. Estimates are made of probable column densities and total masses of SiC in the circumstellar shells.

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