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Science, 1989
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. Pointlike sources such as quasars generally produce two or four images when lensed, whereas extended sources such as galaxies ...
Blandford, R. D. +3 more
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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. Pointlike sources such as quasars generally produce two or four images when lensed, whereas extended sources such as galaxies ...
Blandford, R. D. +3 more
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GRAVITATIONAL LENS AMPLIFICATION OF GRAVITATIONAL RADIATION
International Journal of Modern Physics D, 2002In a recent paper by Wang, Turner and Stebbins (1996) an influence of gravitational lensing on increasing an estimated rate of gravitational radiation sources was considered. We show that the authors used the geometrical optics approximation model for gravitational lensing and thus they gave overestimated rate of possible events for possible sources ...
Alexander F. Zakharov, Yuri V. Baryshev
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Imaging with a Gravitational Lens
Symposium - International Astronomical Union, 1994The basic ideas of gravitational microlensing are discussed. Particular attention is given to the use of a gravitational lens as a (non-standard) telescope, to probe the very small scale structure of extragalactic sources. The recovery of information from a gravitational lens telescope is discussed, as well as the unique contribution which can be made ...
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The Discovery of a Gravitational Lens
Scientific American, 1980A recently discovered, close pair of quasars were surprisingly similar in their characteristics. After rejecting other hypotheses, astronomers suggested that the pair is not a pair at all but two images of a single quasar formed by a gravitational lens, an elliptical galaxy halfway between the quasar and our galaxy. Improved calculations of the effects
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The gravitational lens equation
2003Questo lavoro di tesi discute approfondimenti teorici ed applicazioni cosmografiche dell'equazione della lente gravitazionale. Questa รจ l'equazione fondamentale del lensing gravitazionale, la teoria che descrive la deflessione della luce causata da campi gravitazionali.
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2008
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 ...
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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 ...
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American Journal of Physics, 1969
Simulated gravitational lens made of Plexiglass for demonstrating stellar gravitational lens phenomena, presenting partial cross ...
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Simulated gravitational lens made of Plexiglass for demonstrating stellar gravitational lens phenomena, presenting partial cross ...
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American Journal of Physics, 1981
A plastic lens is described which will bend light rays parallel to the lens axis in the same way as a static (Schwarzschild) gravitational field. This allows one to observe the optical distortions caused by a (nonrotating) black hole directly. The double-imaging property is discussed with particular application to the recently announced double quasar ...
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A plastic lens is described which will bend light rays parallel to the lens axis in the same way as a static (Schwarzschild) gravitational field. This allows one to observe the optical distortions caused by a (nonrotating) black hole directly. The double-imaging property is discussed with particular application to the recently announced double quasar ...
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Gravitational Self-Lens Effect
Physical Review D, 1973The optical image of a luminous mass under the influence of its own gravitational field near the Schwarzschild radius, as in the case of a dense neutron star, is studied. It is found that two important deviations from the classical nonrelativistic behavior occur. First, the stellar body appears to be enlarged by a gravitational self-lens effect. In the
F. Winterberg, W.G. Phillips
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Nature Photonics, 2013
Massive objects in space act as gravitational lenses, bending and focusing light. Scientists have now created a photonic analogue of a gravitational lens on a chip, and have shown that it is strong enough to force light into orbits.
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Massive objects in space act as gravitational lenses, bending and focusing light. Scientists have now created a photonic analogue of a gravitational lens on a chip, and have shown that it is strong enough to force light into orbits.
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