Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...216...31t&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 216, no. 1-2, June 1989, p. 31-38. Research supported by the Naturvetenskaplig
Astronomy and Astrophysics
Astronomy
9
Astronomical Models, Geodetic Coordinates, Quasars, Very Long Base Interferometry, Astronomical Maps, Hydrogen Masers, Light Speed, Radio Jets (Astronomy)
Scientific paper
Eight VLBI maps of 3C 345 were obtained at 8.3 GHz between 1980 and 1986. During this period, the two jet components C4 and C5 were shown to emerge from the core in succession and to move superluminally toward the west with angular velocities of 0.17 + or - 0.5 and 0.11 + or - 0.02 mas/yr, respectively. An emission detected between D and C5 after 1985.46 suggests that a new component emerged from the core, moving at an angular velocity of 0.2 mas/yr. The C3 component retained a velocity of about 0.44 mas/yr, and its proper motion was found to accelerate in the y-direction and decelerate in the x-direction.
Baath L.
Ronnang Bernt
Tang Guoning
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