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Unusual radio source MG1131+0456 - A possible Einstein ringThe discovery of extremely unusual structure in the radio source MG1131+0456 is reported. In a radio map with subsarcsecond resolution the object appears as an elliptical ring of emission accompanied by a pair of more compact sources, nearly diametrically opposed and offset by about 0.3 arcsec to the southwest of the ring. There is a faint, slightly extended, optical counterpart. A continuum but no emission lines is detected in its spectrum; therefore, the redshift of the counterpart is unknown. The radio morphology suggests that this source may be an example of an 'Einstein ring', a highly symmetric case of gravitational lensing in which the source is imaged into a ring. Other explanations are considered and excluded by the data. Another possibility is that MG1131+04565 represents a new type of astronomical object.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Hewitt, J. N. (Haystack Observatory Westford, MA, United States)
Turner, E. L. (Princeton University Observatory, NJ, United States)
Schneider, D. P. (Institute for Advanced Study Princeton, NJ, United States)
Burke, B. F. (Northeast Radio Observatory Corp. Westford, MA, United States)
Langston, G. I. (MIT Cambridge, MA, United States)
Date Acquired
August 13, 2013
Publication Date
June 9, 1988
Publication Information
Publication: Nature
Volume: 333
ISSN: 0028-0836
Subject Category
Distribution Limits