The 51.8 micron (0 3) line emission observed in four galactic H 2 regions

Details The 51.8 micron (0 3) line emission observed in four galactic H 2 regions The 51.8 micron (0 3) line emission observed in four galactic H 2 regions

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978stin...7913961m&link_type=abstract

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Physics

Galaxies, Infrared Spectra, Line Spectra, Oxygen Ions, Spectrum Analysis, Abundance, Electron Density (Concentration), H Ii Regions, Hydrogen

Scientific paper

The (0 III) 51.8 microns line from four H II regions, M42, M17, W51 and NGC 6375A was detected. Respective line strengths are 7 x 10 to the minus 15 power, 1.0 x 10 to the minus 14 power, 2.1 x 10 to the minus 15 power and 2.6 x 10 to the minus 15 power watt cm/2. Observations are consistent with previously reported line position and place the line at 51.80 + or 0.05 micron. When combined with the 88.35 microns (0 III) reported earlier, clumping seems to be an important factor in NGC 6375A and M42 and to a lesser extent in W51 and M17. The combined data also suggest an (0 III) abundance of approximately 3 x 0.0001n e' a factor of 2 greater than previously assumed.

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