Fourteen extragalactic radio sources mapped at 2.3 and 8.4 GHz with a 24-hour Crustal Dynamics Program VLBI experiment

Details Fourteen extragalactic radio sources mapped at 2.3 and 8.4 GHz with a 24-hour Crustal Dynamics Program VLBI experiment Fourteen extragalactic radio sources mapped at 2.3 and 8.4 GHz with a 24-hour Crustal Dynamics Program VLBI experiment

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...229...51c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 229, no. 1, March 1990, p. 51-63. Research supported by CNRS and Institut Geog

Astronomy and Astrophysics

Astrophysics

54

Extragalactic Radio Sources, Very Long Base Interferometry, Bl Lacertae Objects, Mapping, Quasars, Very Large Array (Vla)

Scientific paper

Fourteen extragalactic radio sources have been mapped at 2.3 and 8.4 GHz with a 24-hr Crustal Dynamics Program VLBI experiment on North-Pacific baselines in May 1985. Among these sources, five have never been previously mapped by the VLBI technique and seven are superluminal sources. By comparing these maps with others at close or previous epochs, the main results are: a tentative proposition that the components of the newly mapped source OQ 208 evolve along a highly curved jet, a determination of the proper motion of the recently ejected jet component C5 in 3C 345, an evidence for a high spectral index gradient in the core region of 3C 454.3, and a marginal indication for superluminal motion in DA 193. These maps also emphasize the great potential of Crustal Dynamics Program VLBI experiments to monitor radio source structures on intervals as short as a few months since about 1980.

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