Observations and Analysis of Iron II Emission in Seyfert 1 Galaxies and Qso's.
Abstract
Spectrophotometric observations of nineteen Seyfert 1 galaxies and four quasi-stellar objects with strong Fe 2 emission are presented. Relative emission-line intensities, equivalent widths, and continuum slopes were measured for each object. Analysis of the continuum and emission-line data (excluding Fe 2) indicates that densities Ne = 10 to the 7th power and temperatures T = 5000 - 20000 K likely characterize the broad-line regions. The relative intensities of the Fe 2 10 to the 9th power/cu cm lines are very similar from object to object, indicating that the same physical conditions and excitation mechanism are responsible for the emission. Optically-thin resonance fluorescence and collisional excitation models were calculated.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1977
- Bibcode:
- 1977PhDT.........8P
- Keywords:
-
- Physics: Astronomy and Astrophysics;
- Iron Isotopes;
- Spectrophotometry;
- Spectrum Analysis;
- Emission Spectra;
- Line Spectra;
- Seyfert Galaxies;
- Stellar Spectra;
- Astronomy