LensMEM: A Gravitational Lens Inversion Algorithm Using the Maximum Entropy Method
Abstract
We present a new algorithm for inverting poorly resolved gravitational lens systems using the maximum entropy method (MEM). We test the method with simulations and then apply it to an 8 GHz VLA map of the radio ring lens MG1654+134. We model the lens as a singular isothermal sphere embedded in an external shear field and find the critical radius of the lens is b=09820, the dimensionless shear is γ=0.0771, and the position angle of the shear is θ=1008. These results are consistent with the results obtained by Kochanek (1995) using a complementary inversion algorithm based on Clean.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.