Spectral Indexes of Cool Carbon Stars in the Near-Infrared Region

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Carbon Stars, Cool Stars, Infrared Spectroscopy, Near Infrared Radiation, Stellar Spectra, Spectral Emission, Fourier Transformation, Astronomical Observatories, Indexes, Signal To Noise Ratios

Scientific paper

Near infrared spectroscopic observations of cool carbon stars have been carried out with a Fourier transform spectrometer located at the coude room of the 1.88 m reflector at the Okayama Astrophysical Observatory. Ninety one spectra of 63 carbon stars were analyzed. Three stars were newly added to our program and the total number of analyzed carbon stars reached 104. Sixty five of the program stars were observed twice and 30 stars were observed three times of more to confirm observational accuracies and to check the spectral variables. Nine stars were observed once.

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