Ultra--Steep-Spectrum Radio Sources. I. 4C Objects

Details Ultra--Steep-Spectrum Radio Sources. I. 4C Objects Ultra--Steep-Spectrum Radio Sources. I. 4C Objects

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apjs..106..215c&link_type=abstract

Astrophysical Journal Supplement v.106, p.215

Astronomy and Astrophysics

Astronomy

42

Galaxies: Structure, Galaxies: Active, Galaxies: Distances And Redshifts, Galaxies: Jets, Polarization, Radio Continuum: Galaxies, Surveys

Scientific paper

We present radio total intensity and polarization images and complete optical identifications of a representative sample of ultra-steep- spectrum 4C objects. The radio morphologies are all resolved into double lobes or triples with cores. The radio polarization intensity morphologies are strikingly asymmetric. The optical identifications consist of galaxies in distant clusters (0.4 < z < 1.0), quasars, and high-redshift (z > 1) radio galaxies. We identify several (1 < z < 2) cluster candidates, and faint candidates for very high redshift radio galaxies.

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