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Science 2 May 1980:
Vol. 208. no. 4443, pp. 495 - 497
DOI: 10.1126/science.208.4443.495
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Articles

The Double Quasar 0957+561: Examination of the Gravitational Lens Hypothesis Using the Very Large Array

P. E. GREENFIELD 1, D. H. ROBERTS 1, and B. F. BURKE 1

1 Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge 02139

A full 12-hour synthesis at 6-centimeter wavelength with the Very Large Array confirms the major features previously reported for the double quasar 0957+561. In addition, the existence of radio jets apparently associated with both quasars is demonstrated. Gravitational lens models are now favored on the basis of recent optical observations, and the radio jets place severe constraints on such models. Further radio observations of the double quasar are needed to establish the expected relative time delay in variations between the images.

Submitted on December 26, 1979
Revised on February 19, 1980


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Gas-Rich Galaxy Pair Unveiled in the Lensed Quasar 0957+561.
P. Planesas, J. Martín-Pintado, R. Neri, and L. Colina (1999)
Science 286, 2493-2495
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Science. ISSN 0036-8075 (print), 1095-9203 (online)