view Abstract Citations (133) References (55) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The O ++/H + Abundance Ratio in Gaseous Nebulae Derived from Recombination Lines Peimbert, M. ; Storey, P. J. ; Torres-Peimbert, S. Abstract We present O(2+)/H(+) values for the Orion Nebula, M17, and NGC 6572 based on O II recombination lines, which are independent of the temperature structure of the observed nebulae. In the H II regions sampled (Orion and M17) the O(2+)/H(+) values derived from O II recombination lines are about a factor of two higher than those derived from O III forbidden lines. These differences can be accounted for by the presence of spatial temperature variations over the observed volumes. The abundances derived from the recombination lines eliminate the O/H discrepancy between the stellar values and the H II region values of the solar neighborhood. Publication: The Astrophysical Journal Pub Date: September 1993 DOI: 10.1086/173108 Bibcode: 1993ApJ...414..626P Keywords: Abundance; Hydrogen Ions; Line Spectra; Nebulae; Oxygen Ions; Oxygen Spectra; Astronomical Spectroscopy; Forbidden Transitions; H Ii Regions; Interstellar Matter; Orion Nebula; Planetary Nebulae; Recombination Reactions; Astrophysics; ISM: H II REGIONS; ISM: ABUNDANCES full text sources ADS | data products SIMBAD (4)
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Peimbert et al. (1993) studied this question.