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Profiles and intensity ratios of the C IV lambda 1548, 1550 emission lines in planetary nebulae (1983)

Feibelman, W. A.

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Publication Date: 2011-08-18

Description: The C IV resonance doublet at lambda 1548, 1550 is an important diagnostic tool in the study of planetary nebulae. The predicted theoretical intensity ratio of 2:1 is, however, rarely observed in the high dispersion IUE spectrograms. Values of 0.8-2.0 are observed for a sampling of 11 planetary nebulae of various excitation classes and for three proto-planetary nebulae. A diversity of line profiles is observed. In addition to the C IV doublet, weak subsidiary lines are seen. The spacing between these pseudo-lines happens to correspond to the separation of the C IV lines but are believed to be due to hot pixels and do not conform to the radial velocity displacement of the C IV lines.

Keywords: ASTROPHYSICS

Type: Astronomy and Astrophysics (ISSN 0004-6361); 122; 1-2,; June 198

Format: text

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