Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995acspe..51.1105m&link_type=abstract
Spectrochim. Acta A, Mol. Spectrosc., Vol. 51A, No. 7, p. 1105 - 1115
Astronomy and Astrophysics
Astrophysics
1
Fourier Spectrometers
Scientific paper
The characteristic of the Canada-France-Hawaii Fourier Transform Spectrometer, an astronomical high resolution FTS built in France, which is part of the permanent instrumentation of the telescope, are presented. This instrument is optimized to be able to work on faint sources in the presence of thermal background radiation, in the 1 - 5.4 μm range. Very different types of objects are observed in order to probe their gas content, involving various astrophysical media: comets, planets and their satellites, circumstellar envelopes and very young stars still embedded in their parent molecular cloud. Examples of results are given. Beside spectroscopy of individual objects, new modes of operation are explored. The use of the FTS as a seismometer to detect the pressure oscillations of stars and giant planets has been tested. The field properties of the interferometer can also be exploited by combining the FTS with modern infrared array detectors. Finally, the new challenge created by the future generation of very large telescopes is presented.
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