Molecular spectroscopy from the Kuiper Airborne Observatory

Physics

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C-141 Aircraft, Infrared Spectroscopy, Orion Nebula, Shock Wave Propagation, Focal Plane Devices, Galactic Nuclei, Gratings (Spectra), Hydrogen, Interferon, Line Spectra, Mass Distribution, Spectral Resolution

Scientific paper

Interstellar and circumstellar molecules are investigated through medium-resolution infrared spectrosocpy of the vibration-rotation and pure rotational transitions. A primary goal was the construction and improvement of instrumentation for the near and middle infrared regions, wavelengths between 2 and 10 microns. The main instrument was a cooled grating spectrometer with an interchangeable detector focal plane which could be used on the Kuiper Airborne Observatory (KAO) for airborne observations, and also at ground-based facilities. Interstellar shock waves were investigated by H2 emission from the Orion Nebula, W51, and the proto-planetary nebulae CRL 2688 and CRL 618. The observations determined the physical conditions in shocked molecular gas near these objects. From these it was possible to characterize the energetic history of mass loss from both pre- and post-main sequence stars in the regions.

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