Astronomy and Astrophysics – Astronomy
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.303...26s&link_type=abstract
Nature (ISSN 0028-0836), vol. 303, May 5, 1983, p. 26-31.
Astronomy and Astrophysics
Astronomy
86
Astronomical Maps, Precession, Radio Sources (Astronomy), Brightness Distribution, Data Reduction, Radio Telescopes
Scientific paper
Westerbork Synthesis Radio Telescope maps of faint extended emission associated with several superluminal radio sources are presented. In order to avoid exceptionally large sizes for the superluminal sources, their dominant, long-term axes must be at least 20-30° from the line of sight. This is a considerably larger angle than that demanded by the relativistic beaming interpretation of the superluminal motion in their compact cores, and implies that a wobble or precession of their ejection axes has taken place. Superluminality may thus be a temporary phenomenon.
de Bruyn Ger A.
Schilizzi Richard T.
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