Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...202l..31w&link_type=abstract
Astrophysical Journal, vol. 202, Nov. 15, 1975, pt. 2, p. L31, L32.
Astronomy and Astrophysics
Astronomy
28
Far Infrared Radiation, Fine Structure, Forbidden Bands, Infrared Astronomy, Nebulae, Oxygen Ions, Airborne Equipment, H Ii Regions, Interstellar Matter, Line Spectra, Luminous Intensity, Radio Sources (Astronomy), Thermal Emission
Scientific paper
This paper reports the detection of the fine-structure forbidden line of O III at 88.16 microns in emission from M 17 (the Omega Nebula), which is an optically bright galactic H II region and a strong thermal radio source. The observations were made using an airborne 30-cm telescope and a liquid helium-cooled grating spectrometer with Ge:Ga photoconductive detectors. The line intensity is found to be 2.2 (+1.0, -0.7) by 10 to the -15th power W/sq cm. The results are compared with those of a search for the present line in M 42 as well as with theoretical predictions of the line intensity.
Dennison Brian
Gull George
Harwit Martin
Ward D. B.
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