1986
DOI: 10.1038/319564a0
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A quasar with z = 3.71 and limits on the number of more distant objects

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Cited by 13 publications
(29 citation statements)
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“…Investigations into the comoving space density ρ of flat‐spectrum radio sources selected at 2.7 GHz (Peacock 1985, hereafter P85; Dunlop & Peacock 1990, hereafter DP90), have found evidence of a large increase in ρ out to redshift and seemingly strong evidence for a decline in ρ at higher redshifts. This high‐redshift decline, regardless of its magnitude, has come to be known as the ‘redshift cut‐off’, a term which was first introduced by Sandage (1972).…”
Section: Introductionmentioning
confidence: 99%
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“…Investigations into the comoving space density ρ of flat‐spectrum radio sources selected at 2.7 GHz (Peacock 1985, hereafter P85; Dunlop & Peacock 1990, hereafter DP90), have found evidence of a large increase in ρ out to redshift and seemingly strong evidence for a decline in ρ at higher redshifts. This high‐redshift decline, regardless of its magnitude, has come to be known as the ‘redshift cut‐off’, a term which was first introduced by Sandage (1972).…”
Section: Introductionmentioning
confidence: 99%
“…Dunlop 1998). With these studies in mind, the second motivation of this paper was to determine whether the cosmic evolution of the high‐redshift flat‐spectrum population provides indirect evidence for a cut‐off which, in our opinion, has yet to be established beyond doubt in the parent radio‐luminous steep‐spectrum population (but see DP90, Dunlop 1998).…”
Section: Introductionmentioning
confidence: 99%
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“…The remaining sources are almost all galaxies, for which photometric redshift estimation should be possible. The most spectacular result of the spectroscopy programme was the spectrum of 1351-018 (Dunlop et al 1985).…”
Section: The Parkes Selected Regionsmentioning
confidence: 99%
“…Dunlop et al (1985) show that objects with weak lines like 1351-018 will tend to have stellar UJF colours at ζ 2.5, and so be missed. We must await confirmation of Koo's result from CCD grism surveys sensitive to Lyct equivalent widths W < 100Â.…”
Section: Comparison With Optical Studiesmentioning
confidence: 99%