Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.217..151b&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 217, no. 1-2, p. 151-152
Astronomy and Astrophysics
Astronomy
Absorption Spectra, Carbon Stars, Infrared Astronomy, Infrared Spectra, Line Spectra, Radial Velocity, Spectral Resolution, Stellar Atmospheres, Stellar Composition, Stellar Spectra, Stellar Spectrophotometry, Carbon Monoxide, Extremely High Frequencies, Signal To Noise Ratios, Spectrometers, Stellar Envelopes, Titanium, Velocity Measurement
Scientific paper
We have measured radial velocities of infrared photospheric lines observed in 37 bright carbon stars. The spectra were obtained on the Kitt Peak National Observatory 4 meter telescope with Fourier transform spectrometers between 1976 and 1988. The observations have a typical resolution of 65000 and a typical signal-to-noise ratio of 50. All the spectra cover the 2.0-2.5 micrometer K band with a substantial subset of observations covering the 1.6-2.5 micrometer region (H and K bands). For all 37 spectra, we have measured velocities of 9 Ti I lines in the K-band, as well as velocities of the CO second overtone (delta v = 3) in 28 of these stars and velocities of the high excitation (high J) CO first overtone (delta v = 2) line in 27 stars. Photospheric optical velocities of both molecular (CN) and atomic absorption lines are compared here with the velocities of photospheric infrared lines.
Barnbaum Cecilia
Hinkle Kenneth
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