The Parkes selected regions - Powerful radio galaxies and quasars at high redshifts

Details The Parkes selected regions - Powerful radio galaxies and quasars at high redshifts The Parkes selected regions - Powerful radio galaxies and quasars at high redshifts

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.218...31d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 218, Jan. 1, 1986, p. 31-62. Research supported by Camb

Astronomy and Astrophysics

Astronomy

142

Astronomical Catalogs, Extragalactic Radio Sources, Quasars, Radio Galaxies, Astronomical Coordinates, Astronomical Maps, Luminosity, Photographic Plates, Red Shift

Scientific paper

A complete sample of extragalactic radio sources with flux density S equal to or greater than 0.1 Jy at 2.7 GHz has been compiled to probe the radio luminosity function to redshifts z approximately 3-4. VLA maps are presented for the 188 sources in this flux density range; 178 sources remain in the complete sample after examination for confusion. The new radio data define the structures and positions sufficiently well for a re-examination of existing plate material to have yielded an identification content of 56 per cent of the sample down to V approximately 21. The results from this program will strongly constrain the behavior of the radio population at high redshifts. Unless the comoving density of sources falls for z greater than 2, identification candidates should include many objects with z approximately 3-4. In fact, the present incomplete data already provide some indications that a redshift cut-off is indeed required for both steep- and flat-spectrum sources.

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