Results 21 to 30 of about 49,349 (281)
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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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
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Testing Velocity-field Lensing on IllustrisTNG Galaxies
The Astrophysical Journal, 2023 Weak gravitational lensing shear could be measured far more precisely if information about unlensed attributes of source galaxies were available. Disk galaxy velocity fields supply such information, at least in principle, with idealized models predicting
Jean Donet, David Wittman
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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
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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
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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
Symposium - International Astronomical Union, 1993 In approximately half the systems currently recognized as strongly gravitationally lensed, the background object is an extragalactic radio source. Radio observations have played an important role in the identification of lensed systems, and the properties of radio sources allow some of the astrophysical applications of lensing to be realized.
openaire +2 more sources
Second-order weak lensing from modified gravity [PDF]
, 2011 We explore the sensitivity of weak gravitational lensing to second-order corrections to the spacetime metric within a cosmological adaptation of the parameterized post-Newtonian framework.
Caldwell, Robert R. +2 more
core +3 more sources
Weak Gravitational Lensing [PDF]
Proceedings of Frontiers of Fundamental Physics 14 — PoS(FFP14), 2008 In this brief review I consider the advances made in weak gravitational lensing over the last 8 years, concentrating on the large scales - cosmic shear. I outline the theoretical developments, observational status, and the challenges which cosmic shear must overcome to realise its full potential. Finally I consider the prospects for probing Dark Energy
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Weak Lensing of the Cosmic Microwave Background by Foreground Gravitational Waves [PDF]
, 2006 Weak lensing distortion of the background cosmic microwave background (CMB) temperature and polarization patterns by the foreground density fluctuations is well studied in the literature.
Asantha Cooray +2 more
core +2 more sources