A search for radio emission from a sample of optically selected quasars

Details A search for radio emission from a sample of optically selected quasars A search for radio emission from a sample of optically selected quasars

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....61..487f&link_type=abstract

Astronomy and Astrophysics, vol. 61, no. 4, Nov. 1977, p. 487-491.

Astronomy and Astrophysics

Astronomy

23

Microwave Emission, Optical Emission Spectroscopy, Quasars, Radio Sources (Astronomy), Astronomical Spectroscopy, Distribution Functions, Light Curve

Scientific paper

Sixty-two optically selected quasars (QSOs) have been searched for radio emission at 1415 MHz with the Westerbork Synthesis Radio Telescope. Eight of them have been detected in radio emission. The remaining ones are radio-quiet at levels of about 10 mJy. These data are combined with those of Katgert et al. (1973) on the QSOs of Braccesi et al. (1970), obtaining a sample of 85 objects. The distribution function of the ratio of radio to optical emission is derived. It is shown that there is a disagreement with the one obtained from radio-selected samples. A brief discussion is given on such a discrepancy.

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