Determination of N/O from far-infrared line observations of Galactic H II regions

Measurements of the 52- and 88-micron forbidden O III line ratios and the 57-micron forbidden N III line ratio for six H II regions have been obtained with the NASA Kuiper Airborne Observatory. The derived N/O ratio for most Galactic regions (of about 0.2-0.3) is greater than that obtained by optica...

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Veröffentlicht in:	Astrophys. J.; (United States) 1988-04, Vol.327 (1), p.377-388
Hauptverfasser:	Rubin, R. H., Simpson, J. P., Erickson, E. F., Haas, M. R.
Format:	Artikel
Sprache:	eng
Schlagworte:	640105 - Astrophysics & Cosmology- Galaxies ABUNDANCE Astronomy Astrophysics CHARGED PARTICLES CHEMICAL COMPOSITION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COSMIC RADIO SOURCES Earth, ocean, space ELECTROMAGNETIC RADIATION Exact sciences and technology FAR INFRARED RADIATION GALAXIES H ii regions. Emission and reflection nebulae H2 REGIONS INFRARED RADIATION INFRARED SPECTRA Interstellar medium (ism) and nebulae in milky way IONS ISOTOPES LIGHT NUCLEI MILKY WAY NITROGEN 14 NITROGEN IONS NITROGEN ISOTOPES NUCLEI NUCLEOSYNTHESIS ODD-ODD NUCLEI OPTICS OXYGEN IONS RADIATIONS SPECTRA STABLE ISOTOPES Stellar systems. Galactic and extragalactic objects and systems. The universe SYNTHESIS
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