English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We present the results of an HK' wide-field survey encompassing the HubbleDeep Field and its Flanking Fields. Our wide-field survey provides uniformcoverage of an area 61.8 square arcmin to a depth equivalent to K=20.1 at5-sigma. We have also imaged the Hubble Deep Field in HK', providing uniformcoverage of an area 7.8 square arcmin to a depth equivalent to K=21.2 at5-sigma. Using these data in combination with new deep UH 8K V and I imagingobtained on the CFHT, we find only a small population of objects with colorsredder than an equivalent I-K=4, the color expected for an evolved ellipticalat z>1. We infer that only a fraction of the local field elliptical populationwith M_K<-23.4 could have formed in single bursts at high redshift.Comment: 20 pages, to appear in the Jan 1999 issue of The Astronomical Journa

Constraints on the Early Formation of Field Elliptical Galaxies