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Gravitational Lens Optics

Blandford, R. D. and Kochanek, C. S. and Kovner, Israel and Narayan, Ramesh (1989) Gravitational Lens Optics. Science, 245 (4920). pp. 824-830. ISSN 0036-8075. doi:10.1126/science.245.4920.824.

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Several instances of multiple imaging of cosmologically distant sources by intervening galaxies and galaxy clusters have been discovered over the past decade. These "gravitational lenses" have distinctive optical properties. Point like sources such as quasars generally produce two or four images when lensed, whereas extended sources such as galaxies produce spectacular arcs and rings. The salient features of most of the observations can be reproduced with the use of simple elliptical lens models that approximate the lenses made by ellipsoidal mass distributions such as are common in the universe. In addition to illustrating simple optics in operation on a cosmological scale, multiple images and arcs provide useful probes of the lensing galaxies and clusters. Also, gravitational lenses can make magnified images of cosmologically distant sources and may eventually furnish important cosmographic data such as the Hubble constant.

Item Type:Article
Related URLs:
URLURL TypeDescription
Blandford, R. D.0000-0002-1854-5506
Kochanek, C. S.0000-0001-6017-2961
Narayan, Ramesh0000-0002-1919-2730
Additional Information:© 1989 American Association for the Advancement of Science. R.D.B. and R.N. are indebted to R. Nitayananda for introducing them to the approach described in (4) and for invaluable discussion of elliptical lenses. We thank E. Falco and R. Schild for preparing Fig. 1 and R. Lynds for Fig. 7. Supported under NSF grants AST86-15325 and 86-11121, an AT&T Foundation Graduate Fellowship (C.S.K.), and a Sir Charles Close Fellowship (I.K.).
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Clore Israel FoundationUNSPECIFIED
Issue or Number:4920
Record Number:CaltechAUTHORS:20150116-121820521
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Official Citation:BLANDFORD, R. D., KOCHANEK, C. S., KOVNER, I., & NARAYAN, R. (1989). Gravitational Lens Optics. Science, 245(4920), 824-830. doi: 10.1126/science.245.4920.824
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:53831
Deposited On:16 Jan 2015 20:40
Last Modified:10 Nov 2021 20:07

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