Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.259..751r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 259, no. 4, p. 751-760.
Astronomy and Astrophysics
Astronomy
52
Atmospheric Radiation, Infrared Spectra, Molecular Excitation, Nonthermal Radiation, Molecular Rotation, Spatial Distribution, Telescopes, Vibrational Spectra
Scientific paper
We present 1-2.5-micron spectra of the atmosphere above Mauna Kea. The emission in this region is chiefly nonthermal radiation from excited molecules in the upper atmosphere, but above about 2.3 microns the thermal contribution from the telescope and surroundings dominates. The most important component of the nonthermal emission is from vibrational-rotational transitions of the hydroxyl radical, OH(-). In addition to identifying these lines we examine the temporal and spatial variation of this emission, comparing the results with theories of the origin of the variation. We model the effect of this changing background on an hour-long sequence of observations of different exposure times and demonstrate the importance of frequent sky sampling for observations of extended objects.
Geballe Thomas Ronald
Mountain Charles M.
Ramsay Suzanne K.
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