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

Journal Article · Mon Oct 01 00:00:00 EDT 1979 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/157371· OSTI ID:5631459

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

Observations of the (O III) 88.35 ..mu..m line and the (O I) 63.2 ..mu..m line have been made with a new far-infrared spectrometer. The sources M17, NGC 7538, and W51 have been mapped in the (O III) line with 1' resolution, and the emission is found to be quite widespread. In all cases we find that the peak of the emission coincides with the maximum radio continuum. Where possible, we have simultaneously mapped the far-infrared continuum, 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, in W49, and in a number of positions in the Orion nebula. Upper limits were obtained on NGC 7027, NGC 6572, DR 21, G29.9--0.0, and M82. The 63.2..mu..m (O I) line has been detected in M17, in M42, and marginally in DR 21. 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. The J=1..-->..0 transition of HD at 112..mu..m was also searched for in the direction of the Kleinmann-Low nebula, but without success.

• Research Organization: Department of Physics, University of California, Berkeley
• OSTI ID: 5631459
• Journal Information: Astrophys. J.; (United States), Vol. 233:1
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
NEBULAE
INFRARED SPECTRA
OXYGEN
OXYGEN IONS
FINE STRUCTURE
ABUNDANCE
CHEMICAL COMPOSITION
ELECTRON DENSITY
EMISSION SPECTRA
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
H2 REGIONS
SPECTROMETERS
CHARGED PARTICLES
COSMIC RADIO SOURCES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
IONS
MEASURING INSTRUMENTS
NONMETALS
SPECTRA
640105* - Astrophysics & Cosmology- Galaxies