Detection of the O III 88.16-micron forbidden line in M17

Details Detection of the O III 88.16-micron forbidden line in M17 Detection of the O III 88.16-micron forbidden line in M17

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.

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