PG 1700 + 518 - a low-redshift, broad absorption line QSO

Journal Article · Mon Jul 01 00:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/184512· OSTI ID:5798128

Pettini, M; Boksenberg, A

The first high-resolution optical spectra and lower resolution UV spectra of PG 1700 + 518, the only known broad-absorption-line (BAL) QSO at low emission redshift (0.288) are presented. The optical data were obtained with the Isaac Newton Telescope on the island of La Palma and the UV data with the International Ultraviolet Explorer satellite. The outstanding feature of the optical spectrum is a strong, broad Mg II absorption trough, detached from the Mg II emission line and indicative of ejection velocities of between 7000 and 18,000 km/s. Also detected were narrow (FWHM = 350 km/s) Mg II absorption lines at absolute z = 0.2698, which are probably related to the mass ejection phenomenon. It is concluded that the emission-line spectrum is similar to that of other low-redshift QSOs although there are some obvious differences from typical BAL QSOs, most notably in the unusually low level of ionization of both emission-line and broad absorption line gas. 21 references.

• Research Organization: Royal Greenwich Observatory, Herstmonceux, England
• OSTI ID: 5798128
• Journal Information: Astrophys. J.; (United States), Vol. 294
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
QUASARS
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
ABSORPTION SPECTRA
GALAXY NUCLEI
MAGNESIUM
RED SHIFT
ALKALINE EARTH METALS
COSMIC RADIO SOURCES
ELEMENTS
METALS
SPECTRA
640103* - Astrophysics & Cosmology- Quasi-Stellar
Radio
& X-Ray Sources- (-1987)