Results 21 to 30 of about 50 (49)
Eos, Transactions American Geophysical Union, 1980 ‘… imagine an observer, an isolated galaxy acting as a lens, and a quasar, nearly in a line. Two images would be formed on either side of the lens, and a third one would be formed near the center of the galaxy because the bending for central rays will be small.’ [Jerome Christian, in Physics Today, September 1980.
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The gravitational lens as an astronomical diagnostic
The Astrophysical Journal, 1985 How a point gravitational lens images a diffuse background source is examined, and it is shown that under a wide range of circumstances the image contains a 'gravity ring.' The chief criterion for producing this phenomenon is that the angular scale of brightness variation in the source be smaller than the angular radius of the cone of inversion of the ...
S. M. Chitre, W. C. Saslaw, D. Narasimha
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The Evolution of Gravitational Lens Galaxies
, 1999 Most gravitational lens galaxies are early-type galaxies in relatively low density environments. We show that they lie on the same fundamental plane as early-type galaxies in both local and distant rich clusters. Their surface brightness evolution requires a typical star formation epoch of z=2-3, almost indistinguishable from that of rich cluster ...
Kochanek, C. S. +8 more
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The Gravitational Lens Effect [PDF]
Monthly Notices of the Royal Astronomical Society, 1964 H. Bondi, Sjur Refsdal
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Strong Gravitational Lens Modelling [PDF]
, 2019 The objective of this project is to examine the extent to which strong gravitational lensing can constrain cosmological parameters. I present the results of applying a modified version of an existing model of strong gravitational lensing to forthcoming surveys by Euclid, currently scheduled to launch in 2021, and investigate also how the model may be ...
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On the rotation of polarization by a gravitational lens
, 1992 It is proved that the field of a gravitational lens induces no rotation in the polarization vector of electromagnetic radiation, in agreement with the previous literature, but with a different approach. The result is generalized to the case of less conventional gravitational lenses (static cosmic strings and gravitational waves).
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Transparent Spheres as Gravitational Lens
In this contribution, we present a short account of gravitational lenses and how to calculate different properties of its images in the case of having a transparent distribution of matter such as the uniform transparent sphere, isothermal gas sphere, non-singular isothermal gas sphere and a transparent King profile. With the help of XFGLenses software,
Santiago-Leandro, Edwin +2 more
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The Spheroidal Gravitational Lens
The Astrophysical Journal, 1973 R. Kantowski +2 more
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