Results 21 to 30 of about 126,622 (149)
Proceedings of 8th European VLBI Network Symposium — PoS(8thEVN), 2007 This is a short and biased review of gravitational lensing with emphasis on the radio and especially VLBI aspects. We briefly explain the basic idea and give a short sketch of the discovery of the first lens, before we more systematically discuss the general fields that can be studied with lensing.
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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
core +2 more sources
Lensing of Gravitational Waves as a Novel Probe of Graviton Mass [PDF]
, 2021 The diffraction patterns of lensed gravitational waves encode information about their propagation speeds. If gravitons have mass, the dispersion relation and speed of gravitational waves will be affected in a frequency-dependent manner, which would leave traces in the diffraction pattern if the waves are lensed.
arxiv +1 more source
Weak Lensing of the CMB: Cumulants of the Probability Distribution Function [PDF]
, 2002 We discuss the real-space moments of temperature anisotropies in the cosmic microwave background (CMB) due to weak gravitational lensing by intervening large-scale structure. We show that if the probability distribution function of primordial temperature
A. Blanchard +29 more
core +2 more sources
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.
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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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Strong gravitational lensing with SKA [PDF]
New Astronomy Reviews, 2004 Strong gravitational lenses provide an important tool to measure masses in the distant Universe, thus testing models for galaxy formation and dark matter; to investigate structure at the Epoch of Reionization; and to measure the Hubble constant and possibly w as a function of redshift.
Mckean, J. P. +9 more
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The Ray Bundle method for calculating weak magnification by gravitational lenses [PDF]
, 1998 We present here an alternative method for calculating magnifications in gravitational lensing calculations -- the Ray Bundle method. We provide a detailed comparison between the distribution of magnifications obtained compared with analytic results and ...
C. J. Fluke +24 more
core +3 more sources
Gravitational Lensing in Plasma [PDF]
Proceedings of 25th Texas Symposium on Relativistic Astrophysics — PoS(Texas 2010), 2011 We develop a model of gravitational lensing in plasma. We show that the gravitaional deflection angle by point mass in the homogeneous plasma differs from the vacuum deflection angle and depends on frequency of the photon. The dependence of the lensing angle on the photon frequency in the homogeneous plasma resembles the properties of a refractive ...
Oleg Yu. Tsupko +1 more
openaire +3 more sources
Stellar prospects for FRB gravitational lensing [PDF]
, 2022 Gravitational lensing of fast radio bursts (FRBs) offers an exciting avenue for several cosmological applications. However, it is not yet clear how many such events future surveys will detect nor how to optimally find them. We use the known properties of FRBs to forecast detection rates of gravitational lensing on delay timescales from microseconds to ...
arxiv +1 more source