Observations of far-infrared fine structure lines: O III 88. 35 micrometer and O I 63. 2 micrometer

Technical Report · Mon Jan 01 00:00:00 EST 1979

OSTI ID:5673239

Storey, J W.V.; Watson, D M; Townes, C H

Observations of the O III 88.35 micrometer line and the O I 63.2 micrometer were made with a far infrared spectrometer. The sources M17, NGC 7538, and W51 were mapped in the O III line with 1 arc minute resolution, and the emission is found to be quite widespread. In all cases the peak of the emission coincides with the maximum radio continuum. The far infrared continuum was mapped simultaneously, and in M17, NGC 7538, and W51 the continuum peak is found to be distinct from the center of ionization. The O III line was also detected in W3, W49, and in a number of positions in the Orion nebula. Upper limits were obtained on NGS 7027, NGC 6572, DR21, G29.9-0.0, and M82. The 63.2 micrometer O I line was detected in M17, M42, and marginally in DR21. A partial map of M42 in this line shows that most of the emission observed arises from the Trapezium and from the bright optical bar to the southeast.

• Research Organization: California Univ., Berkeley (USA). Dept. of Physics
• OSTI ID: 5673239
• Report Number(s): N-79-18859
• Country of Publication: United States
• Language: English

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640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640103 -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FAR INFRARED RADIATION
FINE STRUCTURE
INFRARED RADIATION
INFRARED SPECTROMETERS
MAPS
MEASURING INSTRUMENTS
NEBULAE
RADIATIONS
SPECTRA
SPECTROMETERS