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gravitational lens |
Also found in: Wikipedia, Hutchinson | 0.03 sec. |
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gravitational lens [‚grav·ə′tā·shən·əl ′lenz] (astronomy) A massive galaxy or other massive object whose gravitational field focuses light from a distant quasar near or along its line of sight, giving a double or multiple image of the quasar. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Computer modeling revealed that gravitational lensing couldn't plausibly account for the brightness and geometry of the three quasar images. The scientists used a special method called gravitational lensing. To obtain the dark matter distribution, David Wittman, Anthony Tyson and David Kirkman of Bell Labs, along with two collaborators, Ian Dell'Antonio of both the National Optical Astronomy Observatory as well as Brown University and Gary Bernstein of the University of Michigan at Ann Arbor, used a method known as weak gravitational lensing, in which they analyzed the light from 145,000 very distant galaxies for evidence of distortions produced by dark matter that lay in its path. |
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