Elemental abundance determination in gaseous nebulae from IUE lines

Details Elemental abundance determination in gaseous nebulae from IUE lines Elemental abundance determination in gaseous nebulae from IUE lines

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..581r&link_type=abstract

In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 581-58

Astronomy and Astrophysics

Astrophysics

3

Abundance, Carbon, Interstellar Chemistry, Interstellar Gas, Oxygen, H Ii Regions, Iue, Orion Nebula, Ultraviolet Spectra

Scientific paper

A method for obtaining the C/O elemental abundance ratio for high excitation H II regions is discussed. This is then applied to rederive C/O for the Orion Nebula from previous IUE observations using improved atomic data and extinction corrections. It is also found that C/H is ≡20 - 40% lower than previously determined. When recombinations contribute importantly to [O II] 2470 and 7325 Å emission, the authors caution against use of these lines for assessing the O+ ionic abundance with the so-called empirical method.

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