First 43 GHz VLBI-observations with the 30-m radio telescope at Pico Veleta.
1993; EDP Sciences; Volume: 275; Issue: 2 Linguagem: Inglês
ISSN
1432-0746
AutoresT. P. Krichbaum, A. Witzel, D. A. Graham, K. J. Standke, R. L. Schwartz, O. Lochner, C. J. Schalinski, A. Greve, H. Steppe, W. Brunswig, G. Butin, H. Hein, S. Navarro, J. Peñalver, M. Grewing, R. S. Booth, F. Colomer, B. O. Rönnäng,
Tópico(s)Radio Astronomy Observations and Technology
ResumoA three station VLBI experiment performed at 43 GHz (λ = 7 mm wavelength) demonstrated the superior performance of the 30-m millimeter radio telescope of IRAM at Pico Veleta especially for mm-VLBI observations. Although primarily intended as a technical test, these first 43 GHz VLBI observations with Pico Veleta yielded new scientific results. A first VLBI map of Cygnus A (= 3C 405) at 43 GHz shows a core-jet-like structure of ∼4 mas length, with several compact components embedded. The map also shows some evidence for jet bending near the core of about ΔP.A. = 5-15°. The apparent subluminal motion in the inner jet of 3C 84 (= NGC 1275) is confirmed and seems to show (apparent) acceleration along the jet from 21000 km s −1 close to the nucleus to 114000 km s −1 at ∼4 mas separation from the VLBI-core
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