The milliarcsecond structure of highly variable radio sources

Details The milliarcsecond structure of highly variable radio sources The milliarcsecond structure of highly variable radio sources

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...391..589w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 391, no. 2, June 1, 1992, p. 589-607.

Astronomy and Astrophysics

Astronomy

86

Active Galaxies, Extragalactic Radio Sources, Galactic Nuclei, Galactic Radio Waves, Radio Jets (Astronomy), Quasars, Radiant Flux Density, Radio Sources (Astronomy), Very Long Base Interferometry, X Rays

Scientific paper

A new sample of core-dominated extragalactic sources, namely, those whose flux density has exceeded 4.5 Jy at 8 GHz at any epoch, is defined. The present Various Source Sample (VSS) has 41 members. The morphologies and 'scale lengths' (analogous to e-folding lengths) of sources in the complete VSS are discussed to the extent these quantities are known, and they are compared to the sources in the complete flux-limited sample of Pearson and Readhead (1988). The ratio of X-ray to radio luminosities of other sources in the VSS are also discussed. The morphologies of the VSS and the Pearson-Readhead sources are found to be similar. The Pearson-Readhead result that the distribution of position angle differences between milliarcsecond and arcsecond scales shows peaks at 0 and 90 deg is confirmed. BL Lac objects are found to have significantly higher ratios of X-ray to radio luminosities than the quasars in the VSS.

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