Splitting of absorption lines in 3C 191.
Abstract
Spectroscopic observations of the quasar 3C 191 have been made at a higher dispersion than in previous studies in an attempt to detect absorption from the excited fine-structure level of the ground state of C II. It was found that the previously studied absorption system is split into two systems which show apparent line-locking on the C IV 1550-A doublet. Both systems show a similar and wide range of ionization. The results are interpreted in terms of a multiple-cloud model which is photoionized by a central source, and possible implications for the ionization structure in QSOs as a whole are discussed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1975
- DOI:
- 10.1086/153976
- Bibcode:
- 1975ApJ...202..296W
- Keywords:
-
- Absorption Spectra;
- Line Spectra;
- Quasars;
- Red Shift;
- Carbon;
- Fine Structure;
- Mathematical Models;
- Photoionization;
- Radiation Pressure;
- Wave Excitation;
- Astrophysics