Results 51 to 60 of about 841,753 (381)
Investigating gravitational lensing diffraction in the laboratory with structured light [PDF]
EPJ Web of ConferencesWe use spatial light modulation to investigate the diffractive effects of gravitational lensing in the laboratory. Using this new platform for laboratory astrophysics, we can overcome the coherence challenges that prevent the observation of diffraction ...
Galvez Enrique J. +5 more
doaj +1 more source
GRAVITATIONAL LENSING BY WORMHOLES [PDF]
Modern Physics Letters A, 2008 We have investigated the gravitational lensing by two wormholes, viz., Janis–Newman–Winnicour (JNW) wormhole and Ellis wormhole. The deflection angles in the strong field limit are calculated and various lens parameters of two wormholes are compared. It is shown that the JNW wormhole exhibits the relativistic images, while the Ellis wormhole does not ...
Tushar Kanti Dey, Surajit Sen
openaire +3 more sources
Degeneracy in exotic gravitational lensing [PDF]
, 2002 We present three different theoretically foreseen, but unusual, astrophysical situations where the gravitational lens equation ends up being the same, thus producing a degeneracy problem.
Cooray A. +9 more
core +2 more sources
Reducing the weak lensing noise for the gravitational wave Hubble diagram using the non-Gaussianity of the magnification distribution [PDF]
, 2010 Gravitational wave sources are a promising cosmological standard candle because their intrinsic luminosities are determined by fundamental physics (and are insensitive to dust extinction).
C. Shapiro +9 more
core +2 more sources
Highlights of Astronomy, 1992 AbstractAtmospheric lensing effects deform our view of distant objects; similarly, without any doubt, gravitational lensing perturbs our view of the distant Universe and affects our physical understanding of various classes of extragalactic objects.
Sjur Refsdal, Jean Surdej
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KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing [PDF]
, 2016 We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ~450deg$^2$ of imaging data from the Kilo Degree Survey (KiDS).
H. Hildebrandt +35 more
semanticscholar +1 more source
Aberration in gravitational lensing [PDF]
Physical Review D, 2008 It is known that a relative translational motion between the deflector and the observer affects gravitational lensing. In this paper, a lens equation is obtained to describe such effects on actual lensing observables. Results can be easily interpreted in terms of aberration of light-rays.
openaire +3 more sources
Inverting Gravitational Lenses [PDF]
SIAM Review, 2002 Summary: Gravitational lensing provides a powerful tool to study a number of fundamental questions in astrophysics. Fortuitously, one can begin to explore some nontrivial issues associated with this phenomenon without a lot of very sophisticated mathematics, making an elementary treatment of this topic tractable even to senior undergraduates. We give a
Peter R. Newbury, Raymond J. Spiteri
openaire +2 more sources
Gravitational Lensing in Clusters of Galaxies [PDF]
, 1999 Gravitational lensing in clusters of galaxies is an efficient tool to probe the mass distribution of galaxies and clusters, high redshift objects thanks to the gravitational amplification, and the geometry of the universe.
Hattori, M., Kneib, J. -P., Makino, N.
core +2 more sources
Einstein beams and the diffractive aspect of gravitationally-lensed light
New Journal of Physics, 2023 The study of light lensed by cosmic matter has yielded much information about astrophysical questions. Observations are explained using geometrical optics following a ray-based description of light.
V Rodríguez-Fajardo +4 more
doaj +1 more source