SBS1426+606: A Bright Z = 3.165 QSO with a Z = 2.83 Damped Lyman alpha System

Details SBS1426+606: A Bright Z = 3.165 QSO with a Z = 2.83 Damped Lyman alpha System SBS1426+606: A Bright Z = 3.165 QSO with a Z = 2.83 Damped Lyman alpha System

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.1805c&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #18.05; Bulletin of the American Astronomical Society, Vol. 26, p.1338

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We report the characteristics of a damped Lyalpha absorber toward a bright, high-redshift QSO, discovered by the Second Byurakan Survey. With z=3.165 and V ~ 16.0, SBS 1425+606 is one of the brightest known QSOs with z > 3 and one of the most luminous discovered to date. We present a 1 Angstroms resolution spectrum of the object taken with the Multiple Mirror Telescope from its Lyalpha emission line shortward into the Lyalpha forest and confirm the existence of a moderately strong damped Lyalpha absorption system at z = 2.83 tentatively identified in the discovery spectrum. Voigt profiles superposed on the data suggest that the column density of this cloud is N(HI) ~ 2.5 times 10(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 Lyalpha system at relatively high redshift, but unfortunately, such a system will attenuate SBS1425+606 sufficiently that it cannot be observed in the far UV with the Hubble Space Telescope.

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