New Global VLBI observations of the gravitational lensing system MG J0414+0534

Proceedings of the 10th EVN symposium “VLBI and the new generation of radio arrays” in Manchester, UK, 21-24 September 2010
PoS (10th EVN Symposium) (2010) 029

F. Volino [1], O. Wucknitz [1], R.W. Porcas [2], E. Ros [3,2], J.P. McKean [4], A. Brunthaler [2], J.A. Munoz [3], P. Castangia [5], M.A. Garrett [4,6,7], C. Henkel [2], C.M.V. Impellizzeri [8], A. Roy [2]

  1. Argelander-Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, Germany
  2. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 71, 53121 Bonn, Germany
  3. Departament d'Astronomia i Astrofìsica, Universitat de Valencia, E-46100 Burjassot, Valencia, Spain
  4. ASTRON, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, The Netherlands
  5. Osservatorio Astronomico di Cagliari, Loc. Poggio dei Pini, Strada 54, 09012 Capoterra (Ca), Italy
  6. Leiden Observatory, Leiden University, Postbus 9513, 2300 RA Leiden, The Netherlands
  7. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Australia
  8. National Radio Astronomy Observatory, 520 Edgemont Road Charlottesville, VA 22903-2475, United States

Abstract

The gravitational lens system MG J0414+0534 is formed by an elliptical galaxy at redshift z ∼ 0.96 and a quasar at z ∼ 2.64. The system geometry is typical of lensing by an elliptical galaxy with the QSO close to and inside a fold caustic. It shows 4 images of the background source, and a partial Einstein ring is visible at optical wavelengths. It was observed with a global-VLBI array at l 18 cm in June 2008. We present here the imaging results and a preliminary lens model constrained by these observations.


PoS (10th EVN Symposium) (2010) 029 (link to online journal)


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