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Astron. Astrophys. 362, 845-850 (2000)

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VLBI imaging of the gravitational lens MG J0414+0534

E. Ros 1, J.C. Guirado 2,3, J.M. Marcaide 2, M.A. Pérez-Torres 2, E.E. Falco 4, J.A. Muñoz 4,5, A. Alberdi 6 and L. Lara 6

1 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
2 Departament d'Astronomia i Astrofísica, Universitat de València, 46100 Burjassot (València), Spain
3 Centro de Astrobiología, Instituto Nacional de Técnica Aeroespacial, Carretera de Ajalvir s/n, 28850 Torrejón de Ardoz (Madrid), Spain
4 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02183, USA
5 Instituto de Astrofísica de Canarias, Vía Láctea s/n, 38200 La Laguna (Tenerife), Spain
6 Instituto de Astrofísica de Andalucía-CSIC, Apdo. 3004, 18080 Granada, Spain

Received 20 January 2000 / Accepted 12 April 2000


We observed the quadruple gravitationally lensed image of MG J0414+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.

Key words: techniques: interferometric – galaxies: jets – galaxies: quasars: individual: MG J0414+0534 – cosmology: gravitational lensing

Present address: Istituto di Radioastronomia, Via Gobetti 101, I-40129 Bologna, Italy

Send offprint requests to: E. Ros (ros@mpifr-bonn.mpg.de)

© European Southern Observatory (ESO) 2000

Online publication: October 30, 2000