EROs in the EIS Fields. I: The AXAF (Chandra) Deep Field

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dc.creatorScodeggio, M.
dc.creatorSilva, D.
dc.date2000-04-17
dc.date.accessioned2026-07-07T01:53:11Z
dc.date.available2026-07-07T01:53:11Z
dc.descriptionThe publicly available EIS-DEEP optical-NIR data for the AXAF (Chandra) Deep Field have been used to construct samples of Extremely Red Objects (EROs) using various single-band and multi-band color criteria. In this work we define as EROs objects with colors consistent with passively evolving elliptical galaxies at z $\geq$ 1. The EROs surface densities we derive are intermediate between previous published values, emphasizing again the need for larger survey areas to constrain the effects of possible large-scale structure. Although various single-color selected samples can be derived, the EROs sample selected using R-Ks > 5, I-Ks > 4, J-Ks > 1.8 jointly is likely to contain the highest fraction of passively evolving luminous field elliptical galaxies at z >= 1, or conversely, the lowest fraction of lower redshift interlopers. The surface density of this multi-band selected EROs sample is consistent with the conclusion that little or no field elliptical volume density evolution has occurred in the redshift range 0 > z > 1.5. However, extensive spectroscopic followup is necessary to confirm this conclusion.
dc.description8 pages, 4 figures. Accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0004228
dc.identifierhttp://arxiv.org/abs/astro-ph/0004228
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/874
dc.subjectAstrophysics
dc.titleEROs in the EIS Fields. I: The AXAF (Chandra) Deep Field
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