Discovery of a New Gravitational Lens System

Creators: Lawrence, C. R.; Schneider, D. P.; Schmidt, M.; Bennett, C. L.; Hewitt, J. N.; Burke, B. F.; Turner, E. L.; Gunn, J. E.

Abstract

A new gravitational lens system, the triple radio source MG2016+112, has been discovered. Five emission lines at a redshift of 3.2733±0.0014 have been identified in the spectra of two stellar objects of magnitude 22.5 coincident with radio components 3.4 arc seconds apart. The lines are the narrowest ever observed in objects at such a large redshift. The redshift of a 23rd-magnitude extended optical object coincident with the third radio component has not been determined spectroscopically, but its known optical properties are consistent with those of a giant elliptical galaxy with a redshift of about 0.8.

Additional Information

© 1984 American Association for the Advancement of Science. 17 November 1983; accepted 7 December 1983. Astronomical research at the California Institute of Technology, the Massachusetts Institute of Technology, and the Princeton University Observatory is supported by the National Science Foundation. E.L.T. is an Alfred P. Sloan Foundation Fellow.

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Discovery of a New Gravitational Lens System

Abstract

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