Constraints on the Early Formation of Field Elliptical Galaxies

Details Constraints on the Early Formation of Field Elliptical Galaxies Constraints on the Early Formation of Field Elliptical Galaxies

1998-09-24

arxiv.org/abs/astro-ph/9809299v1

Astronomy and Astrophysics

Astrophysics

20 pages, to appear in the Jan 1999 issue of The Astronomical Journal

Scientific paper

10.1086/300675

We present the results of an HK' wide-field survey encompassing the Hubble Deep Field and its Flanking Fields. Our wide-field survey provides uniform coverage of an area 61.8 square arcmin to a depth equivalent to K=20.1 at 5-sigma. We have also imaged the Hubble Deep Field in HK', providing uniform coverage of an area 7.8 square arcmin to a depth equivalent to K=21.2 at 5-sigma. Using these data in combination with new deep UH 8K V and I imaging obtained on the CFHT, we find only a small population of objects with colors redder than an equivalent I-K=4, the color expected for an evolved elliptical at z>1. We infer that only a fraction of the local field elliptical population with M_K<-23.4 could have formed in single bursts at high redshift.

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