0254-334/2: a high redshift QSO without Lyman alpha emission or absorption.
Abstract
Results are reported for low-dispersion spectroscopic observations of the approximately 16th magnitude QSO 0254-334/2 over the wavelength range from about 3200 to 7000 A with a resolution of approximately 7 A. Previous spectroscopic observations of this source and the nearby radio source PKS 0254-334/R are discussed, along with a subsequent high-resolution spectrum of 0254-334/2. It is found that 0254-334/2 has an emission redshift of 1.857, strong P Cygni-type absorption lines, and apparently no appreciable L-alpha in either emission or absorption. Possible explanations for the lack of L-alpha in emission and in absorption are briefly considered.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- September 1979
- DOI:
- 10.1093/mnras/188.4.711
- Bibcode:
- 1979MNRAS.188..711W
- Keywords:
-
- Absorption Spectra;
- Lyman Alpha Radiation;
- Quasars;
- Radio Spectra;
- Red Shift;
- Doppler Effect;
- Emission Spectra;
- Radio Sources (Astronomy);
- Astrophysics;
- Lyman Alpha:Quasi-Stellar Objects;
- Quasi-Stellar Objects:Redshifts;
- Quasi-Stellar Objects:Spectra