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Gravitational lens optics

Blandford, R. D. (1989) Gravitational lens optics. In: Gravitational Lenses. Lecture Notes in Physics. No.330. Springer , Berlin, pp. 38-52. ISBN 978-3-540-51061-1.

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Recently, interest in gravitational lenses has expanded to include the study of the images of extended sources such as galaxies as well as of those of unresolved point sources like quasars. The giant luminous arcs associated with the rich clusters Abell 370, Cl2244-02, and Abell 963, together with the ring radio source MG1131+0456, are now widely believed to be gravitationally imaged. Some simple geometrical ways to understand the formation of extended images are described in this article. It is explained how the image shape is controlled by the location of the source relative to the caustic surfaces formed by the lens. Multiply-imaged extended sources generally create larger magnifications and furnish more information about the gravitational potential of the lens than do multiply-imaged point sources. A simple iterative method for deriving the source structure is described and some preliminary results for MG1131+0456 are exhibited. Future observational prospects are briefly discussed.

Item Type:Book Section
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Blandford, R. D.0000-0002-1854-5506
Additional Information:© 1989 Springer-Verlag. I thank my collaborators, C. Kochanek, I. Kovner, C. Lawrence, R. Narayan, S. Phinney, and G. Soucail for many discussions on these and related topics. I am indebted to J. Moran for helpful editorial suggestions. Support by the National Science Foundation under NSF grant AST86-15325, the John Simon Guggenheim Foundation, and the Harvard Smithsonian Center for Astrophysics is gratefully acknowledged.
Funding AgencyGrant Number
NSFAST 86-15325
John Simon Guggenheim FoundationUNSPECIFIED
Harvard Smithsonian Center for AstrophysicsUNSPECIFIED
Subject Keywords:Radio Source; Hubble Space Telescope; Critical Curve; Source Plane; Extended Source
Series Name:Lecture Notes in Physics
Issue or Number:330
Record Number:CaltechAUTHORS:20190605-101920571
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96142
Deposited By: Tony Diaz
Deposited On:06 Jun 2019 04:45
Last Modified:16 Nov 2021 17:18

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