Kenneth H. Hinkle

Detection of C3 in the Circumstellar Shell of IRC+10216

The C5 molecule has been identified in the infrared spectrum of the prototypical obscured carbon star, IRC+10216. In addition to their astrophysical importance, pure carbon chain molecules such as C5 are of interest in the chemistry of flames and propellants.

Medium-Resolution Spectra of Normal Stars in the K Band

An Atlas of 115 medium-resolution K-band (2.0-2.4 μm) stellar spectra, spanning spectral types O-M and luminosity types I-V, is presented. K-band spectra are also presented for one N- and one J-type carbon star. A time series of spectra is presented for an S-type Mira variable. All the spectra are at a resolution of ~3000 (1.4 cm-1) and have had the terrestrial absorption removed by dividing by a featureless spectrum. The spectra are plotted with the major spectral features identified and are available digitally.

Near-Infrared Classification Spectroscopy: H-Band Spectra of Fundamental MK Standards

^{a}

Observations of H3+ in Dense Molecular Clouds

Supported by the Fannic and John Hertz Foundation

Detection of H3+ in the Diffuse Interstellar Medium: The Galactic Center and Cygnus OB2 Number 12

^{b}

INFRARED ATLAS OF THE ARCTURUS SPECTRUM, 0.9-5.3 MICRONS

T.R. Gehalle and T. Oka, Nature 384, 334 (1996)

Infrared Spectroscopy of Symbiotic Stars. I. Orbits for Well-Known S-Type Systems

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Time series infrared spectroscopy of the Mira variable chi Cygni

B.J. McCall, T.R. Geballe, K.H. Hinkle, and T. Oka, Science, in press

Fluorine abundance variations in red giants of the globular cluster M4 and early-cluster chemical pollution

We present a catalog of H-band spectra for 85 stars of approximately solar abundance observed at a resolving power of 3000 with the KPNO Mayall 4 m Fourier Transform Spectrometer. The atlas covers spectral types O7-M5 and luminosity classes I-V as defined in the MK system. We identify both atomic and molecular indices and line ratios that are temperature and luminosity sensitive, allowing spectral classification to be carried out in the H-band. The line ratios permit spectral classification in the presence of continuum excess emission, which is commonly found in pre-main-sequence or evolved stars. We demonstrate that with spectra of R = 1000 obtained at signal-to-noise ratio >50, it is possible to derive spectral types within ±2 subclasses for late-type stars. These data are available electronically through the Astronomical Data Center in addition to being served on the World Wide Web.