The double quasar Q0957 + 561 A, B - A gravitational lens image formed by a galaxy at Z = 0.39

Details The double quasar Q0957 + 561 A, B - A gravitational lens image formed by a galaxy at Z = 0.39 The double quasar Q0957 + 561 A, B - A gravitational lens image formed by a galaxy at Z = 0.39

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241..507y&link_type=abstract

Astrophysical Journal, Part 1, vol. 241, Oct. 15, 1980, p. 507-520.

Astronomy and Astrophysics

Astrophysics

219

Galactic Clusters, Gravitational Lenses, Quasars, Spatial Distribution, Astronomical Models, Gravitational Effects, Imaging Techniques, Mass Distribution

Scientific paper

Deep CCD pictures show a rich cluster of galaxies around the double quasar Q0957 + 561 as well as faint extended wings on the image of the southern quasar. Calculations of gravitational imaging by King model mass distributions show that the cluster and the brightest galaxy together, acting as a gravitational lens on the light from a single, more distant QSO, can easily reproduce all of the present observations. It is concluded that the double quasar is almost certainly the multiple image of a single object produced by a gravitational lens.

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