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05 November 2024
 
  » arxiv » astro-ph/9709128

 Article overview



A 5 GHz Southern Hemisphere VLBI Survey of Compact Radio SOurces - I
Z.-Q. Shen ; T.-S. Wan ; J. M. Moran ; D. L. Jauncey ; J. E. Reynolds ; A. K. Tzioumis ; R. G. Gough ; R. H. Ferris ; M. W. Sinclair ; D.-R. Jiang ; X.-Y. Hong ; S.-G. Liang ; M. E. Costa ; S. J. Tingay ; P. M. McCulloch ; J. E. J. Lovell ; E. A. King ; G. D. Nicolson ; D. W. Murphy ; D. L. Meier ; T. D. van Ommen ; P. G. Edwards ;
Date 14 Sep 1997
Subject astro-ph
Affiliation1,2), T.-S. Wan , J. M. Moran , D. L. Jauncey , J. E. Reynolds , A. K. Tzioumis , R. G. Gough , R. H. Ferris , M. W. Sinclair , D.-R. Jiang , X.-Y. Hong , S.-G. Liang , M. E. Costa , S. J. Tingay , P. M. McCulloch , J. E. J. Lovell , E. A. King , G. D
AbstractWe report the results of a 5 GHz southern hemisphere VLBI survey of compact extragalactic radio sources. These observations were undertaken with the SHEVE array plus Shanghai station in November 1992. A sample of 22 sources was observed and images of 20 of them were obtained. Of the 20 sources imaged, 15 showed core-jet structure, one had a two-sided jet and 4 had only single compact cores. Eleven of the 16 core-jet (including one two-sided jet) sources show some evidence of bent jets. No compact doubles were found. A comparison with previous images and the temporal variability of the radio flux density showed evidence for superluminal motion in 4 of the sources. Five sources were high energy (>100 MeV) gamma-ray sources. Statistical analysis showed the dominance of highly polarized quasars among the detected gamma-ray sources, which emphasizes the importance of beaming effect in the gamma-ray emission.
Source arXiv, astro-ph/9709128
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