B0218+35.7 - A gravitationally lensed system with the smallest separation

Details B0218+35.7 - A gravitationally lensed system with the smallest separation B0218+35.7 - A gravitationally lensed system with the smallest separation

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.261..435p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 261, no. 2, p. 435-444.

Astronomy and Astrophysics

Astronomy

130

Active Galaxies, Gravitational Lenses, Radio Sources (Astronomy), Hubble Constant, Radio Astronomy

Scientific paper

Evidence from the VLA, the newly enhanced MERLIN, and the European VLBI Network is presented which demonstrates that the strong flat-spectrum radio source B0218+35.7 is a gravitationally lensed system. It has two bright components separated by about 335 mas with similar radio spectra, fractional polarizations, and intrinsic position angles. Both components are compact on the mas scale while component A is elongated in a direction expected for a simple lens model. B0218+35.7 can be understood as a single lensing object of low ellipticity lying in front of the jet of a core-jet radio source. Observations of the system therefore may allow an estimate of H0 to be made.

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