Deep imaging of high redshift QSO fields below the Lyman limit. I - The field of Q0000-263 and galaxies at Z = 3.4

Astronomy and Astrophysics – Astronomy

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Astronomical Photography, Heavy Elements, Imaging Techniques, Lyman Spectra, Quasars, Red Shift, Absorption Spectra, Lyman Alpha Radiation, Sky Surveys (Astronomy)

Scientific paper

Results are presented for the first field completed in a new survey involving very deep imaging of the fields of high redshift QSOs which exhibit thick Lyman limit absorption systems that completely remove the QSO from the observed broadband UV bandpass. The broadband colors of galaxies near the QSO sightline are examined with knowledge of the redshifts of heavy element absorption systems already discovered in the QSO spectrum. It is suggested that the colors and magnitudes are more consistent with a moderately underluminous galaxy at z = 0.438. A galaxy is identified which is 2.3 mag fainter and is only 2.8 arcsec from the QSO sightline, which is undetected in the present UV bandpass, and could plausibly be associated with the object responsible for the 3.390-z damped Ly-alpha absorption system in the spectrum of Q0000-263.

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