Abstract:view Abstract Citations (40) References (49) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Carbon in planetary nebulae. Kaler, J. B. Abstract Carbon abundances are c...view Abstract Citations (40) References (49) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Carbon in planetary nebulae. Kaler, J. B. Abstract Carbon abundances are calculated for 53 planetary nebulae from the strength of the optical 4267-A C II line, whose intensity is corrected where necessary for systematic error by comparing it to the known intensities of 4541-A He II, the 4363-A O III forbidden line, and 4471-A He I. Total C/O ratios are derived on an arbitrary scale, and then scaled to the C/O ratios that have been measured for eight nebulae from analyses of their far-ultraviolet spectra. It is found that although some individual nebulae may have an excess of carbon, the median of the distribution of C/O values is similar to the solar value. This comparison, however, depends on the selection of, and scaling to, the ultraviolet data. The C/O ratios derived do not support Becker and Iben's (1980) theoretical prediction that C/O becomes greatly enhanced as He/H increases. Publication: The Astrophysical Journal Pub Date: October 1981 DOI: 10.1086/159276 Bibcode: 1981ApJ...249..201K Keywords: Abundance; Carbon; Line Spectra; Planetary Nebulae; Electron Density Profiles; Galactic Evolution; Hydrogen; Oxygen; Ultraviolet Spectra; Astrophysics full text sources ADS | data products SIMBAD (53)Read More
Publication Year: 1981
Publication Date: 1981-10-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 15
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot