Emission-line-continuum correlations in active galactic nuclei.
Abstract
Continuum properties of emission-line galaxies and Seyfert 2 galaxies are presented. When these results are compared with previously published data, H-alpha is found to correlate over a range of 7 orders of magnitude with the optical featureless continuum. This implies that the parameters affecting H-alpha might be uniform from emission-line galaxies to QSOs. Other emission-line luminosities are found to correlate well with the continuum luminosity. Both the H-alpha and He II 4686 A relations are consistent with a photoionization hypothesis, but only if the ionizing continuum has a high-frequency turnoff between approximately 60 and 175 eV.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1981
- DOI:
- 10.1086/158678
- Bibcode:
- 1981ApJ...244...12S
- Keywords:
-
- Active Galactic Nuclei;
- Astronomical Spectroscopy;
- Emission Spectra;
- Seyfert Galaxies;
- Continuous Spectra;
- H Alpha Line;
- Helium;
- Quasars;
- Astronomy