A Cluster of Galaxies at Redshift z=3.4?

Details A Cluster of Galaxies at Redshift z=3.4? A Cluster of Galaxies at Redshift z=3.4?

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.8702g&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #87.02; Bulletin of the American Astronomical Society, Vol. 25, p.1427

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Scientific paper

We report the likely detection of a cluster of 16 radio-quiet galaxies at redshift z=3.4, identified in the field around the optically thick absorption system toward Q0000-263 at zabs=3.390. Two of these galaxies, a Lyalpha emitter at zem=3.428 and the one responsible for the absorption system, have redshifts spectroscopically confirmed. The other 14 galaxies have been identified with a multi--color imaging technique that makes use of passbands (U_n, G and {cal R} properly designed to detect sources in the redshift interval 31) will discriminate between the two competing scenarios for the formation of the large-scale structure, generically referred to as ``top-down'' and ``bottom--up'' models. In addition, for the first time, a significant number of high-redshift radio-quiet galaxies is available for establishing the general properties of young, normal galaxies. Their rest-frame UV SED is very blue, basically consistent with a flat spectrum (after accounting for Lyman alpha forest blanketing), which is typical of star--forming galaxies. The SFRs measured from the continuum luminosity range between 30 and 100 Msuny(-1) .

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