A moderate-resolution spectral atlas of carbon stars: R, J, N, CH, and barium stars

We have compiled a moderate-resolution spectral atlas to aid in the classification of carbon stars on the 1993 Revised MK system of Keenan as refined and extended by the present work. The main purpose of this atlas is to permit rapid and reasonably accurate comparison of the properties of carbon stars in the solar neighborhood with those in the Galactic bulge, the Magellanic Clouds, and other nearby external systems. The classification scheme employed makes no assumptions about evolutionary status of the stars but is based entirely on observable criteria. Spectra of 39 stars are presented in detail, along with a catalog of 119 carbon stars classified according to the Revised MK system.