Spectra of the low-excitation nebulosities around AG Carinae and HD 138403.
Abstract
Summary. Complex splitting of lines in the ring nebula surrounding the P Cyg supergiant AG Car is observed and discussed. The system is contrasted with the low-excitation planetary nebula HD 138403 (with a more normal Of nucleus) in which new emission lines are found without observed splitting. They include Oi, [0 I], Si II, [S III], and (in nucleus) unidentified 4504, 4485. AG Car is also compared with such objects as P Cyg, FG Sge, Eta Car and S bor.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 1977
- DOI:
- 10.1093/mnras/180.1.95
- Bibcode:
- 1977MNRAS.180...95T
- Keywords:
-
- Emission Spectra;
- Line Spectra;
- Planetary Nebulae;
- Supergiant Stars;
- Astronomical Spectroscopy;
- Ring Structures;
- Spectrophotometry;
- Astrophysics