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VLBI imaging of the gravitational lens MGJ0414+0534

AuthorsRos, E.; Guirado, J. C.; Marcaide, J. M.; Pérez-Torres, Miguel A. ; Falco, E.; Muñoz, J. A.; Alberdi, Antxón ; Lara, Luisa María
KeywordsTechniques: interferometric
Galaxies: jets
Galaxies: quasars: individual: MGJ0414+0534
Cosmology: gravitational lensing
Issue Date29-Sep-2000
PublisherEDP Sciences
Astronomy & Astrophysics, 362, 845-850 (2000)
AbstractWe observed the quadruple gravitationally lensed image of MGJ0414+0534 on 23 November 1997 with a global VLBI array at 8.4 GHz. We report wide-field imaging results of its four components at submilliarcsecond resolution, displaying complex core-like and jet-like extended structures. A simple model combining a singular isothermal ellipsoid to represent the main lens galaxy, external shear, and a singular isothermal sphere to represent an additional, nearby object accounts well for the core positions and flux densities of the VLBI images. This model predicts delays between the different lensed images of several weeks.
Description6 pages, 3 figures, accepted for publication in Astronomy & Astrophysics.-- Final full-text version of the paper available at: http://aa.springer.de/papers/0362003/2300845.pdf
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