Results 31 to 40 of about 126,622 (149)
Null Cones in Schwarzschild Geometry [PDF]
, 1998 Light cones of Schwarzschild geometry are studied in connection to the Null Surface Formulation and gravitational lensing. The paper studies the light cone cut function's singularity structure, gives exact gravitational lensing equations, and shows that ...
Ezra T. Newman +10 more
core +3 more sources
Lensing of 21-cm Fluctuations by Primordial Gravitational Waves [PDF]
, 2012 Weak-gravitational-lensing distortions to the intensity pattern of 21-cm radiation from the dark ages can be decomposed geometrically into curl and curl-free components.
Book, Laura +2 more
core +1 more source
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
Gravitational lensing of gravitational waves: wave nature and prospects for detection [PDF]
, 2019 We discuss the gravitational lensing of gravitational wave signals from coalescing binaries. We delineate the regime where wave effects are significant from the regime where geometric limit can be used. Further, we focus on the effect of micro-lensing and the combined effect of strong lensing and micro-lensing.
arxiv +1 more source
Scattering of gravitational radiation. Intensity fluctuations [PDF]
, 2006 Aims. The effect of gravitational microlensing on the intensity of gravitational radiation as it propagates through an inhomogeneous medium is considered. Lensing by both stars and a power law spectrum of density perturbations is examined.
Macquart, J.-P.
core +4 more sources
Numerical wave optics and the lensing of gravitational waves by globular clusters
, 2007 We consider the possible effects of gravitational lensing by globular clusters on gravitational waves from asymmetric neutron stars in our galaxy. In the lensing of gravitational waves, the long wavelength, compared with the usual case of optical lensing,
Bicknell, G. V. +4 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
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
Exact gravitational lensing and rotation curve [PDF]
Gen.Rel.Grav.43:143-154,2011, 2009 Based on the geodesic equation in a static spherically symmetric metric we discuss the rotation curve and gravitational lensing. The rotation curve determines one function in the metric without assuming Einstein's equations. Then lensing is considered in the weak field approximation of general relativity.
arxiv +1 more source
, 2011 In this paper, we obtain a relation between the high-energy absorption cross section and the strong gravitational lensing for a static and spherically symmetric black hole. It provides us a possible way to measure the high-energy absorption cross section
A. A. Starobinsky +5 more
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