First identification of pure rotation lines of NH in the infrared solar spectrum

Details First identification of pure rotation lines of NH in the infrared solar spectrum First identification of pure rotation lines of NH in the infrared solar spectrum

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..550g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 2, Sept. 1991, p. 550-552.

Astronomy and Astrophysics

Astrophysics

15

Imides, Infrared Spectra, Molecular Rotation, Molecular Spectra, Solar Spectra, Ground State, Photosphere, Solar Atmosphere, Spectral Line Width, Vibrational Spectra

Scientific paper

Pure rotation lines of NH of the v = 0 level and v = 1 level are detected in high-resolution solar spectra obtained from the Atmospheric Trace Molecule Spectroscopy (ATMOS) experimental observations. It is pointed out that the identification of the lines is favored by the typical appearance of the triplet lines of nearly equal intensities. The observed equivalent widths of these triplet lines are compared with predicted intensities, and it is observed that these widths are systematically larger than the predicted values. It is noted that because these very faint lines are observed in a region where the signal is very low, a systematic error in the measurements of the equivalent widths cannot be ruled out; therefore, the disagreement between the observed and predicted intensities is not considered to be real.

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