Pearson-Readhead survey sources - Properties of the centimeter-wavelength flux and polarization of a complete radio sample

Details Pearson-Readhead survey sources - Properties of the centimeter-wavelength flux and polarization of a complete radio sample Pearson-Readhead survey sources - Properties of the centimeter-wavelength flux and polarization of a complete radio sample

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...399...16a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 399, no. 1, p. 16-28.

Mathematics

Probability

69

Astronomical Polarimetry, Bl Lacertae Objects, Quasars, Radio Astronomy, Linear Polarization, Probability Distribution Functions, Red Shift, Variability, Very Long Base Interferometry

Scientific paper

A monitoring program to systematically observe the integrated total flux density and linear polarization of sources in the Pearson-Readhead sample of extragalactic objects at 4.8, 8.0, and 14.5 GHz is discussed. The large data base obtained is used to investigate the statistical behavior of the flux and polarization in this well defined sample and to search for the dependence of these properties on other radio and optical properties. Variability is shown to be a nearly universal characteristic of BL Lac-type objects and QSOs at 14.5 GHz. At the lowest frequency, 4.8 GHz, the fraction of objects exhibiting variability and the amplitude of the variations are significantly reduced. Variability is correlated with a centimeter-wavelength spectral index and with VLBI structural compactness and, marginally, with redshift, but the average percentage polarization exhibits no correlation with these parameters.

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