Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261...18h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 1, p. 18-24.
Astronomy and Astrophysics
Astronomy
14
Galactic Nuclei, Galactic Structure, Quasars, Radio Astronomy, Very Long Base Interferometry, Astronomical Interferometry, Radio Emission, Very Large Array (Vla)
Scientific paper
Results are presented of a second (subsequent to one by Rarthel et al., 1984) VLBI survey of a sample (of 12) of extended quasars from the Burbidge et al. (1977) catalog. The paper describes the observations and the data reduction procedures and reviews the results for each individual source. For six of the sources, additional observations of the associated large-scale radio structure was obtained at 5 and 15 GHz with the very large array (VLA). The VLBI and VLA data for these quasars are presented and a comparison is made between the morphologies of the pc-scale nuclear structure (presumed to be due to recent activity) and the overall morphology of the extended quasars (produced by integrated activity over 10 exp 7 years), giving an insight into the evolution of radio jets in these large objects.
Barthel Peter D.
Hooimeyer Jeanette Rosita Arienne
Miley George K.
Schilizzi Richard T.
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