Abstract
view Abstract Citations (57) References (29) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Infrared line measurements and the abundance of sulfur in planetary nebulae. Dinerstein, H. L. Abstract Ionic abundances of S(+), S(++), and S(+3) relative to hydrogen are determined for 12 planetary nebulae from observations of the S II forbidden lines at 6716 and 6731 A, the S III forbidden line at 9531 A, the S IV forbidden line at 10.5 microns, and P delta 10049 A. The derived total abundances are insensitive to electron density and electron temperature and are found to vary by no more than 30% in the sample; unlike previous determinations, there is no correlation of the abundance with the degree of ionization. The mean elemental abundance for these objects is S/H = 2.1 plus or minus 0.6 x 10 to the -5th, which is, within the measurement errors, the same as the solar value and the abundance in the present interstellar medium as represented by the H II regions K3-50 and Orion. Publication: The Astrophysical Journal Pub Date: April 1980 DOI: 10.1086/157892 Bibcode: 1980ApJ...237..486D Keywords: Abundance; Infrared Spectroscopy; Planetary Nebulae; Sulfur; Electron Density (Concentration); Electron Energy; Forbidden Transitions; H Ii Regions; Interstellar Matter; Line Spectra; Astrophysics full text sources ADS | data products SIMBAD (12)
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