Ionization and abundances in the Dumbbell nebula

Details Ionization and abundances in the Dumbbell nebula Ionization and abundances in the Dumbbell nebula

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pasp...90...39h&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 90, Feb.-Mar. 1978, p. 39-44.

Other

32

Abundance, Ionization, Line Spectra, Planetary Nebulae, Astronomical Spectroscopy, Electron Density (Concentration), Helium, Neon, Nitrogen, Oxygen Spectra, Radiant Flux Density, Sulfur

Scientific paper

We present line intensities measured at six positions in the Dumbbell nebula exhibiting a wide range of ionization. At each position the electron density, temperatures, and ionic abundances of helium, oxygen, nitrogen, neon, and sulfur are computed. We estimate the total abundances of nitrogen, neon, and sulfur by assuming that the oxygen ionization distribution is a good guide to the ionization distribution of these other elements. The agreement of the total abundances in the six positions indicates that this is a good assumption for nitrogen and sulfur, but not for neon. I(lambda 3869) increases with I(lambda 3727) implying that Ne(++) evidently coexists with O(+) in the low ionization regions.

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