Further monitoring of the structure of superluminal radio sources

Details Further monitoring of the structure of superluminal radio sources Further monitoring of the structure of superluminal radio sources

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229...53s&link_type=abstract

Astrophysical Journal, Part 1, vol. 229, Apr. 1, 1979, p. 53-72.

Astronomy and Astrophysics

Astronomy

65

Quasars, Radio Sources (Astronomy), Astronomical Models, Data Reduction, Graphs (Charts), Radiant Flux Density, Very Long Base Interferometry

Scientific paper

Results are reported for VLBI measurements of the compact extragalactic radio sources 3C 120, 3C 273, 3C 279, and 3C 345, which were performed at six epochs between 1975.40 and 1977.13 at a frequency of 10,650 MHz as well as in 1976.52 and 1977.41 at a frequency of 5010 MHz. The observations were made to study possible changes in source structure. Sets of correlated flux densities are presented as functions of interferometer hour angle for the various baselines or, equivalently, as functions of the orthogonal components of the projected interferometer baselines in wavelengths. Uncertainties in model fitting are examined, and the individual sources are discussed in detail. Superluminal apparent transverse velocities of component separation are derived for each source on the assumption that the redshifts are cosmological.

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