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Published September 2003 | Submitted
Journal Article Open

The surface density of Extremely Red Objects in high-z quasar fields

Abstract

We report on a study of the surface density of Extremely Red Objects (EROs) in the fields of 13 quasars at 1.83σ level. Hence, it appears that the quasar lines of sight are biased towards regions of high ERO density. This might be caused by clusters or groups of galaxies physically associated with the quasars. However, an equally likely possibility is that the observed ERO excess is part of overdensities in the ERO population along the line of sight to the quasars. In this case, the non-randomness of quasar fields with respect to EROs may be explained in terms of gravitational lensing.

Additional Information

© 2003 Elsevier B.V. Available online 30 May 2003.

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