gravitational lens

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gravitational lens
Abell 2218, a cluster of galaxies in the constellation Draco

gravitational lens

n.
A massive object, such as a star or galaxy, whose gravitational field bends light rays.

gravitational lens

n
(Astronomy) astronomy a lenslike effect in which light rays are bent when passing through the gravitational field of such massive objects as galaxies or black holes

gravita′tional lens′



n.
Astron. a celestial body, as a galaxy, whose gravitational field refracts the light of a more distant object.
[1945–50]
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References in periodicals archive ?
Specifically, Mandelbaum studies weak gravitational lensing, which looks at distortions in images of distant galaxies obtained by telescopes.
The dark matter distribution is estimated by the weak gravitational lensing technique.
niad, "Weak gravitational lensing from regular Bardeen black holes," International Journal of Theoretical Physics, vol.
To do this, they used a technique called weak gravitational lensing.
In their attempts to rein in these two elephants in the room, astronomers employ various techniques or "probes." One such probe is weak gravitational lensing (see our cover story on page 34).
Five lectures from the course cover re-ionization of the intergalactic medium, weak gravitational lensing, large-scale structure observations, galaxy formation, and cosmology from theory to data and from data to theory.
Jean-Paul Kneib, said that this work opened up a new window to constrain cosmology with weak gravitational lensing and they could not only reveal where the dark matter was located using space-time distortion, but also use the distributions of mass peaks to better constrain and understand the Universe better.
The survey will investigate the dynamics of the large scale structure of the Universe by studying four phenomena: Type Ia supernovae; Baryon Acoustic Oscillations, which are fluctuations of density visible in the universe; small changes over time in galaxy clusters; and weak gravitational lensing.
From the preface: "This is the second Fermi School devoted to the astrophysics of galaxy clusters, held 4 years after the School `Background Microwave Radiation and Intracluster Cosmology.'" Papers and written versions of seminars from the 2008 meeting address basic properties of clusters of galaxies and the physics of the intracluster gas, simulating galaxy clusters, galaxy systems in the optical and infrared, recent results from S-Z measurements, chemo-dynamical simulations of the intra-cluster medium, the supermodel of the intracluster plasma, simulations of the thermodynamics of the intra-cluster medium, and cluster weak gravitational lensing, among other topics.
Such cosmic filaments have been detected using weak gravitational lensing combined with statistical tomographic techniques.
Among the topics are the status and future prospects for ultra-high energy cosmic ray physics in the northern hemisphere, VERITAS observations of galactic gamma-ray sources, neutrino probe comparisons of supernovae as a function of redshift, the angular power spectrum of the diffuse gamma-ray background as a probe of galactic dark matter substructure, digging into dark matter with weak gravitational lensing, and cosmological and astrophysical implications of sterile neutrinos.