New Global VLBI observations of the gravitational lensing system MG J0414+0534
F. Volino, O. Wucknitz, R.W. Porcas, E. Ros, J.P. McKean,, A.Brunthaler, J.A.Munoz, P. Castangia, M.A. Garrett, C. Henkel, C.M.V., Impellizzeri, A. Roy

TL;DR
This paper presents high-resolution VLBI observations of the gravitational lens system MG J0414+0534, revealing detailed imaging and a preliminary lens model that enhance understanding of the system's structure and lensing effects.
Contribution
First high-resolution VLBI imaging of MG J0414+0534 at 18 cm, providing new insights into its lensing geometry and a preliminary mass model.
Findings
Resolved four images of the background quasar.
Detected a partial Einstein ring at optical wavelengths.
Developed a preliminary lens model based on VLBI data.
Abstract
The gravitational lens system MG J0414+0534 is formed by an elliptical galaxy at redshift ~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 18 cm in June 2008. We present here the imaging results and a preliminary lens model constrained by these observations.
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Taxonomy
TopicsGeophysics and Gravity Measurements · Astronomy and Astrophysical Research · Radio Astronomy Observations and Technology
