Fourier Transform Spectrophotometry and its Application to the Study of K-Giants

Highlights of Astronomy ◽

10.1017/s153929960000201x ◽

1974 ◽

Vol 3 ◽

pp. 327-339 ◽

Cited By ~ 1

Author(s):

S. T. Ridgway

Keyword(s):

Fourier Transform ◽

Fourier Transform Spectrometer ◽

Medium Resolution ◽

Typical Data ◽

K Giants

AbstractA Fourier Transform Spectrometer has been employed to obtain low and medium resolution spectrophotometry in the range 700 to 10000 cm-1. The method is described briefly and typical data are shown. The technique is applied to a study of 15 K giants, and spectra of 4 and 16 cm-1resolution in the range 4000 to 6500 cm-1 are discussed briefly. CN strong stars are found to be CO strong as well. Five K giants are found to have a relative 13C enhancement over probable primordial abundances.

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The spectrum of gaseous methane at 77 K in the 1.1 – 2.6 μm region: a benchmark for planetary astronomy

Canadian Journal of Physics ◽

10.1139/p89-180 ◽

1989 ◽

Vol 67 (11) ◽

pp. 1027-1035 ◽

Cited By ~ 26

Author(s):

A. R. W. McKellar

Keyword(s):

Fourier Transform ◽

High Resolution ◽

Low Temperature ◽

Spectral Resolution ◽

Fourier Transform Spectrometer ◽

Absorption Cell ◽

Model Calculations ◽

Testing Model ◽

Medium Resolution ◽

Spectrometer Data

The spectrum of CH4 obtained in CH4 plus N2 mixtures at a temperature of 77 K has been recorded with a spectral resolution of 0.14 cm−1 in the region 3800 to 9100 cm−1. The experiments were performed with long paths (66 or 88 m) in a cooled absorption cell using a Fourier-transform spectrometer. Data are presented here at low and medium resolution, and examples of some spectral regions are also shown at high resolution. The complete results are available from the author in an Appendix. Comparisons are made with previous model calculations of CH4 absorption, and with the observed spectrum of Neptune's satellite, Triton. The results should be useful for the interpretation of the spectra of Triton, Titan, and Pluto. They will also be of value for testing model calculations of low-temperature CH4 absorption, which, thus verified, can be used with greater confidence to analyze observations of Jupiter, Saturn Uranus, and Neptune.

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Medium Resolution Spectroscopy at 1-2 Microns

International Astronomical Union Colloquium ◽

10.1017/s0252921100104208 ◽

1979 ◽

Vol 47 ◽

pp. 239-246

Author(s):

J. R. Mould

Keyword(s):

Fourier Transform ◽

Main Sequence ◽

Classification Criteria ◽

Fourier Transform Spectrometer ◽

Main Sequence Stars ◽

Composite Spectra ◽

Medium Resolution ◽

M Stars

AbstractThe need for establishing classification criteria at long wavelengths is stressed. The usefulness of doing this is illustrated with a discussion of the composite spectra of FU Orionis stars. Spectra of these pre-main-sequence stars from 1.5-2.5μ were obtained with a Fourier Transform Spectrometer. Luminosity criteria in the l-2μ range are also discussed with application to M stars.

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