Surface density of faint high-redshift quasi-stellar objects

Details Surface density of faint high-redshift quasi-stellar objects Surface density of faint high-redshift quasi-stellar objects

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.327..125a&link_type=abstract

Nature (ISSN 0028-0836), vol. 327, May 14, 1987, p. 125-127.

Astronomy and Astrophysics

Astronomy

3

Quasars, Radiant Flux Density, Red Shift, Astronomical Spectroscopy, Brightness Distribution

Scientific paper

The discovery of the faint, z = 4.01 QSO raised the possibility that previous slitless spectroscopic surveys were biased against high-redshift QSOs. Here, the discovery of a faint, red QSO at z = 3.56, selected by 'traditional' low-dispersion spectroscopic methods, is reported. The surface density of very faint, high-redshift QSOs may thus not be negligible, with a variety of lines of evidence suggesting that there are at least about 0.2/sq deg objects with z of 3.4 or higher.

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