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Superluminal Expansion of 3C 273

Pearson, T. J. and Unwin, S. C. and Cohen, M. H. and Linfield, R. P. and Readhead, A. C. S. and Seielstad, G. A. and Simon, R. S. and Walker, R. C. (1982) Superluminal Expansion of 3C 273. In: Extragalactic Radio Sources. IAU Symposium Proceedings Series. No.97. D. Reidel , Dordrecht, pp. 355-356. ISBN 9789027713841.

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Figure 1 shows hybrid maps of the core of 3C 273B at five epochs, made with arrays of 4 or 5 VLBI antennas. The maps span a period of 3.5 years. They all show a bright eastern peak and a lower-brightness extension to the west. There is a local maximum in the western extension between 6 and 8 milliarcsec from the main peak. This “blob” moves steadily further away from the main peak along a roughly straight line in PA −116° ± 2°. Compare this with the position angle of the 25-arcsec optical jet, −137°. The maps show a slight curvature to the south with increasing separation from the main peak. Lower-resolution VLBI maps at lower frequencies show that this curvature continues at greater separations, suggesting a smooth connection between the milli-arcsecond position angle and the position angle of the optical jet. In our latest map (1981.09) the blob is no longer detectable with the limited dynamic range of the VLBI network (about 20:1).

Item Type:Book Section
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URLURL TypeDescription
Pearson, T. J.0000-0001-5213-6231
Readhead, A. C. S.0000-0001-9152-961X
Additional Information:© 1982 by the IAU. This work was supported by the NSF (AST 79-13249).
Funding AgencyGrant Number
NSFAST 79-13249
Series Name:IAU Symposium Proceedings Series
Issue or Number:97
Record Number:CaltechAUTHORS:20181121-090807122
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Official Citation:Pearson, T., Unwin, S., Cohen, M., Linfield, R., Readhead, A., Seielstad, G., . . . Walker, R. (1982). Superluminal Expansion of 3C 273. Symposium - International Astronomical Union, 97, 355-356. doi:10.1017/S0074180900028126
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91129
Deposited By: Tony Diaz
Deposited On:21 Nov 2018 17:29
Last Modified:16 Nov 2021 03:38

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