Extremely Red Objects in the Field of QSO 1213–0017: A Galaxy Concentration at z = 1.31

Abstract

We have discovered an excess of extremely red objects (EROs) surrounding the z = 2.69 quasar QSO 1213–0017 (UM 485). Optical/IR colors for these galaxies are consistent with z = 1 − 2 ellipticals, and there are at least 5 galaxies with spectroscopic redshifts at z ≈ 1.31. Keck optical spectra for 3 of the red galaxies show rest-frame UV breaks resembling… (More)

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