Spectroscopy of the QSO pair PKS 0254-334

Details Spectroscopy of the QSO pair PKS 0254-334 Spectroscopy of the QSO pair PKS 0254-334

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.199...81w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 199, Apr. 1982, p. 81-91.

Astronomy and Astrophysics

Astronomy

14

Astronomical Spectroscopy, Line Spectra, Lyman Alpha Radiation, Quasars, Absorption Spectra, Carbon, Emission Spectra, Gas Ionization, Red Shift, Silicon

Scientific paper

The radio quasar PKS 0254-334/R with emission redshift equal to 1.9130 is located 60 arcsec from the radio-quiet QSO 0254-334/2 with emission redshift equal to 1.8640. Spectroscopy with a resolution of approximately 2 A has identified nine absorption-line systems in 0254-334/2 - four definite, four probable and one possible. The L-alpha absorption line is extraordinarily weak relative to the heavy-element lines in three of these systems, implying that hydrogen is almost absent or nearly totally ionized. Absorption by Mg II at a common redshift of about 0.213 is possibly present in both members of the quasar pair although their separation is unusually large. This absorption may be caused by two separate galaxies in a cluster or by a single cloud

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