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

(2) NOAO; (3) Caltech); Arjun Dey (2); Charles C. Steidel (3); James R. Graham (1); Kurt L. Adelberger (3) ((1) UC Berkeley; Michael C. Liu (1)

arxiv: astro-ph/9910434 · v1 · submitted 1999-10-25 · 🌌 astro-ph

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

Michael C. Liu (1) , Arjun Dey (2) , James R. Graham (1) , Charles C. Steidel (3) , Kurt L. Adelberger (3) ((1) UC Berkeley , (2) NOAO , (3) Caltech) This is my paper

classification 🌌 astro-ph

keywords galaxiesextremelygalaxyobjectsopticalarisingbreakscluster

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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.

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

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