Extremely Red Objects in the Field of QSO 1213–0017: A Galaxy Concentration at z = 1.31
نویسندگان
چکیده
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 local elliptical galaxies. Our initial results suggest a coherent structure in redshift, possibly arising from a massive galaxy cluster.
منابع مشابه
to appear in the June 2000 issue of the Astronomical Journal Extremely Red Objects in the Field of QSO 1213–0017: A Galaxy Concentration at z = 1.31 1,2
We have discovered a concentration of extremely red objects (EROs; R − K > 6) in the field of the z = 2.69 quasar QSO 1213–0017 (UM 485), which is significantly overabundant compared to the field ERO surface density. The optical/near-IR colors of the EROs and numerous other red galaxies in this field are consistent with elliptical galaxies at z = 1 − 2. HST optical images for a subset of galaxi...
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تاریخ انتشار 1999