Heterodyne spectroscopy for astrophysical applications using tunable laser sidebands at 10 microns |
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| Authors: | H. Rothermel U. Schrey G. Magerl W. Schupita |
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| Affiliation: | (1) Max-Planck-Institut für extraterrestrische Physik, Forschungsgelände, D-8046 Garching, Germany;(2) Inst. f. Nachrichtentechnik, Technische Universität Wien, Gusshausstr. 25, A-1040 Wien, Austria |
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| Abstract: | A heterodyne system was assembled from a microwave tunable sideband laser, a blackbody source, a gas cell, a CdHgTe photomixer and a filterbank. A measurement of line profiles of CH3F is presented and compared with absorption measurements. System sensitivity is sufficient for high resolution measurement of fine structure lines from astronomical objects, though falling short by a factor of 12, when compared with the most sensitive astronomical heterodyne spectrometers. The usefulness of such a system for astrophysical applications is discussed. |
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