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For refcode 1991A&A...241...35B:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1991A&A...241...35B A determination of the local radio luminosity function of radiogalaxies at 408 MHz L. Basso, G. Grueff, and M. Vigotti Via Lavino, 129, Monte S. Pietro (BO), Italy Dipartimento di Astronomia, University of Bologna, Bologna, Italy Istituto di Radioastronomia C.N.R., Via Irnerio 46,1-40126 Bologna, Italy Received November 10, 1989; accepted July 9, 1990 Abstract. We present 107 new optical identifications of radio-sources from the B 3 survey with galaxies in the Catalog of Galaxies and of Clusters of Galaxies (CGCG) catalogue. Special care has been devoted to accurately determinate rms positional errors and to derive the luminosity distribution of random contaminants. Furthermore, statistical incidence of extended double radiosources in the identification content has been examined and discussed. The sample of optical identifications has been employed to estimate the local (z < 0.1) radio luminosity function (LRLF) of radiogalaxies at 408 MHz, in the range 10^20.4^ -10^25.6^ W/Hz (H_0_ = 100). As usual, S-Irr galaxies dominate the LRLF at low radio powers, but the contribution of E-S0 galaxies, in this range, seems more substantial than previously claimed, confirming a recent finding by Sadler et al. (1989). In particular, no evidence was found for the so-called "break" in the LRLF of E-S0 galaxies. The present determination of the LRLF has been compared with some previous estimates by means of a {chi}^2^ goodness of fit test. The test showed some inconsistence between all functions analysed. We suggest that such discrepancies, although possibly due to various error underestimates, could be connected to spatial anisotropies of the nearby Universe. Key words: radiogalaxies - optical identifications - luminosity functions
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