VLBI imaging of the gravitational lenses B1422+231 and MGJ0414+0534
E. Ros, J. C. Guirado, J. M. Marcaide, M. A. Perez-Torres, E. E. Falco, J. A. Munoz, A. Alberdi, L. Lara
Abstract
We present wide-field images of the quadruple gravitational lenses B1422+231 and MGJ0414+0534 obtained from global Very Long Baseline Interferometry (VLBI) observations at 8.4 GHz on 23 November 1997. We present also a lens model for MGJ0414+0534, which reproduces the core positions and flux densities of the VLBI images, combining a singular isothermal ellipsoid with external shear, and a singular isothermal sphere to represent, respectively, the main lens galaxy and its neighbor, a faint galaxy near one of the images.
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