Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..745m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Oct. 1, 1987, p. 745-758.
Astronomy and Astrophysics
Astronomy
8
Extragalactic Radio Sources, Quasars, Radio Galaxies, Relativistic Velocity, Luminosity, Red Shift, Statistical Analysis
Scientific paper
The statistical predictions of the unified scheme of steep-spectrum and flat-spectrum extragalactic radio sources based on the relativistic beaming model are explored. It is assumed that each radio source consists of a flat-spectrum compact core moving with relativistic speed and steep-spectrum extended lobes. The authors construct a luminosity function of steep-spectrum components which is consistent with observations of the local luminosity function, source counts and redshift distribution of steep-spectrum sources. Using this, they calculate the source counts and redshift distributions of flat-spectrum sources. A model in which the cores of radio galaxies are assumed to be weaker than those of quasars is also examined. It is found that relativistic cores in radio galaxies are still needed to reproduce the observations.
Morisawa Katsuro
Takahara Fumio
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