A method for efficient measurement of gravitational lensing time delays

  • Gulay Gurkan

Student thesis: Master of Science by Research

Abstract

This thesis presents an efficient technique for measuring lensing time delays which does not require regular monitoring with a high-resolution interferometer array. This method uses asymmetric double image and long-axis quadruple radio lens systems in which the brighter component(s) varies first and dominates the total flux density. Monitoring the total flux density with low-resolution but high sensitivity radio telescopes provides the variation of the brighter image and is used to trigger high-resolution observations which can then be used to see the variation in the fainter image.The efficiency of this technique was assessed by performing simulations using the Pelt dispersion statistic and artificial light curves. The results of the cross-correlation simulations demonstrated that time delays can be determined to
Date of Award1 Aug 2011
Original languageEnglish
Awarding Institution
  • The University of Manchester
SupervisorNeal Jackson (Supervisor)

Keywords

  • Gravitational Lensing
  • Radio Interferometry

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