Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93..255c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 93, Feb. 1987, p. 255-260.
Astronomy and Astrophysics
Astronomy
16
Continuous Radiation, Emission Spectra, Galactic Structure, Quasars, Radio Sources (Astronomy), Radio Spectra, Astronomical Spectroscopy, Blazars, Spiral Galaxies, Supernova Remnants, Visible Spectrum
Scientific paper
Seven low-redshift quasars that are likely to be in spiral galaxies have been observed in a search for radio-continuum emission from the host galaxies of quasars. The properties of the individual quasars are listed, and 1.49 GHz contour maps of the seven quasar fields are presented. Map parameters and radio source parameters are given along with optical images of three of the objects. The results indicate that these quasars probably do reside in spiral galaxies. The radio luminosities, sizes, orientations, and u values all indicate that relativistic beaming alone cannot be used to explain the differences between the present sources and the far stronger radio sources seen in blazars or larger optically selected quasar samples. However, an apparent correlation between the radio luminosity and the ratio of the optical nuclear to host-galaxy luminosity is consistent with some beaming of nuclear radiation.
Condon James J.
Gower Ann C.
Hutchings John B.
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