Observations of the Lyman limit in 19 QSOs.
Abstract
From direct spectroscopic observations of the Lyman-limit region in 32 QSOs, 19 of which are described here, it is found that the covering factor for large absorbing clouds in the emission region is likely to be less than or approximately equal to 0.15. Under these circumstances, it is unlikely that the mechanism for explaining the low Ly-alpha/H-beta emission-line intensity ratios in QSOs involves significant suppression of Ly-alpha.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 1981
- DOI:
- 10.1093/mnras/195.3.437
- Bibcode:
- 1981MNRAS.195..437S
- Keywords:
-
- Astronomical Spectroscopy;
- Lyman Alpha Radiation;
- Nebulae;
- Quasars;
- Absorption Spectra;
- Astronomical Catalogs;
- Electromagnetic Absorption;
- Emission Spectra;
- Optical Thickness;
- Astrophysics