An unusually strong Einstein ring in the radio source PKS1830 - 211

Details An unusually strong Einstein ring in the radio source PKS1830 - 211 An unusually strong Einstein ring in the radio source PKS1830 - 211

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.352..132j&link_type=abstract

Nature (ISSN 0028-0836), vol. 352, July 11, 1991, p. 132-134. CSIRO-supported research.

Computer Science

85

Extragalactic Radio Sources, Gravitational Lenses, Imaging Techniques, Very Long Base Interferometry, Galactic Structure, Radio Telescopes, Red Shift, Stellar Luminosity

Scientific paper

High-resolution radio images of PKS1830 - 211 are obtained to study the possibility that the double structure is a gravitationally lensed object. The VLBI observations, taken from interferometric radiotelescope networks, reveal an elliptical ring that connects two bright spots of similar composition. Because the lens and the lensed object are closely aligned, and because of the structure of the two spots, the source is concluded to be a radio Einstein ring. The source is found to be close to the galactic plane, and the lens and the lensed object are extragalactic. The source is also found to be unusually bright, suggesting that it is aligned with a bright background source or amplified by some mechanism related to a source that is not so bright.

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