Work

LensMEM: A Gravitational Lens Inversion Algorithm Using the Maximum Entropy Method

Year: 1996

Type: article

Abstract: We present a new algorithm for inverting poorly resolved gravitational lens systems using the maximum entropy method. We test the method with simulations and then apply it to an 8 GHz VLA map of the radio ring lens MG 1654+134. We model the lens as a singular isothermal sphere embedded in an external shear field and find that the critical radius of the lens is b = 0.9820, the dimensionless shear is γ = 0.0771, and the position angle of the shear is θ = 100.8^deg^. These results are consistent with the results obtained by Kochanek using a complementary inversion algorithm based on Clean.

Source: The Astrophysical Journal

DOI: 10.1086/177401

Authors: Sylvanie Wallington, Christopher S. Kochanek, Ramesh Narayan

Institutions: Harvard University, Center for Astrophysics Harvard & Smithsonian

Language: English

Topic: Astrophysical Phenomena and Observations

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1997877854

FWCI: 1.44

Cites:

Cited by: 62

Related to: 10