INFRARED VELOCITIES OF CARBON STARS

We have measured radial velocities of infrared photospheric lines obse rved in 37 bright carbon stars. The spectra were obtained on the Kitt Peak National Observatory 4 meter telescope with Fourier transform spe ctrometers between 1976 and 1988. The observations have a typical reso lution of 65000 and a typical signal-to-noise ratio of 50. All the spe ctra cover the 2.0-2.5 mum K band with a substantial subset of observa tions covering the 1.6-2.5 mum region (H and K bands). For all 37 spec tra, we have measured velocities of 9 Ti I lines in the K-band, as wel l as velocities of the CO second overtone (DELTAv=3) in 28 of these st ars and velocities of the high excitation (high J) CO first overtone ( DELTAv=2)line in 27 stars. Photospheric optical velocities of both mol ecular (CN) and atomic absorption lines are compared here with the vel ocities of photospheric infrared lines.