High-redshift radio galaxies from the Molonglo catalogue

McCarthy, P. J. ; Kapahi, V. K. ; Breugel, W. van ; Subrahmanya, C. R. (1990) High-redshift radio galaxies from the Molonglo catalogue Astronomical Journal, 100 (4). pp. 1014-1027. ISSN 0004-6256

PDF - Publisher Version

Official URL: http://adsabs.harvard.edu/abs/1990AJ....100.1014M

Related URL: http://dx.doi.org/10.1086/115575


We report the result of radio and optical observations of a sample of southern hemisphere radio galaxies, selected from the Molonglo Reference Catalogue. The source were selected to have 408 MHz flux densities greater than 0.9 Jy and low-frequency spectral indices steeper than -0.9 VLA 6 cm maps and optical identifications of 13 sources are presented. All of these sources are indentified with faint galaxies, many of which have extended optical structures with morphologies characteristics od high redshift (Z > 0.8) radio galaxies. Long - slit spectroscopic observation have yielded redshifts for 11 of the galaxies, 5 of which are at Z > 2. The most distant source in the present sample, 0316 - 257, has a redshift of 3.13, while the median redshift for the sample is 1.6. Our result for this subsample suggest that our total sample of 150 sources may contain ~ 40 galaxies with Z > 2. We have imaged four of our galaxies having Z > 2 in the light of Lyα. Three of these have highly extended Lyα emission distributed along their radio axes.

Item Type:Article
Source:Copyright of this article belongs to American Astronomical Society.
Keywords:Astronomical Catalogs; Astronomical Spectroscopy; Radio Astronomy; Radio Galaxies; Red Shift; Flux Density; Imaging Techniques; Southern Hemisphere
ID Code:59236
Deposited On:08 Sep 2011 10:57
Last Modified:18 May 2016 09:52

Repository Staff Only: item control page