Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...309..702s&link_type=abstract
Astronomy and Astrophysics, v.309, p.702-704
Astronomy and Astrophysics
Astrophysics
6
Quasars: Individual: Sbs 1425+606, Quasars: Absorption Lines
Scientific paper
Discovered from spectroscopic follow-up observations of candidates from the Second Byurakan Survey, SBS 1425+606, with z=3.165 and V=15.9, is one of the brightest known QSOs with z>3 and one of the most luminous discovered to date. We present a 1A resolution spectrum of the object from its Lyα emission line shortward into the Lyα forest and confirm the existence of a moderately strong damped Lyα absorption system at z=2.83 tentatively identified as a possible BAL in the discovery spectrum. Voigt profiles superposed on the data suggest that the column density of this putative "Lyα disk" is N(HI)~2.5x10^20^cm^-2^. The brightness of SBS1425+606 and the existence of this system make this QSO a compelling target for detailed study of a damped Lyα system at relatively high redshift, but unfortunately, such a system will attenuate SBS1425+606 sufficiently that it will be too faint to be observed in the far UV with the Hubble Space Telescope.
Chaffee Frederic H.
Chavushian V. H.
Foltz Craig B.
Green Richard F.
Stepanian J. A.
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