HIGH-RESOLUTION SPECTRA OF ORDINARY COOL STARS IN THE K-BAND

We present an atlas of high-resolution (R greater than or equal to 45, 000) 2.02-2.41 mu m spectra of 12 representative stars, a sunspot, thr ee Mira variables, and a carbon star. The stars sample MK spectral typ es from about early-G to about mid-M, with luminosity classes dwarf to supergiant. The Mira variables are one each of M, S, and C types. All of the spectra have been corrected for atmospheric absorption and hav e the major spectral features labeled with responsible absorbers. Spec tra and line lists are also available on the AAS CD-ROM series Vol. 7. The 2.0-2.4 mu m region-includes molecular vibration-rotation transit ions from the CO first overtone, HF fundamental, and several bands of H2O as well as the CN red system, an electronic transition. The relati ve contribution of H2O versus CN in cool star spectra is discussed. At omic features include clean measurable lines of H, C, Na, Mg, Al, Si, S, Ca, Sc, Ti, V, and Fe. We discuss temperature and luminosity spectr al indicators and the effects of blending on these indicators at lower spectral resolution.