Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-07-09
Astronomy and Astrophysics
Astrophysics
Accepted for publication in Astronomy & Astrophysics, 15 pages, 16 figures, needs aa.cls
Scientific paper
10.1051/0004-6361:20010987
We observed the thirteen extragalactic radio sources of the S5 polar cap sample at 8.4 GHz with the Very Long Baseline Array, on 1997.93 and 1999.41. We present the maps from those two epochs and briefly discuss the morphological changes experimented by some of the radio sources in the 1.4 yr elapsed. These results correspond to the first two epochs at 8.4 GHz of a program directed to study the absolute kinematics of the radio source components of the members of the sample by means of phase delay astrometry at 8.4, 15 and 43 GHz.
Guirado Jose C.
Marcaide Juan Maria
Perez-Torres Miguel Angel
Ros Eduardo
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