منابع مشابه
Gravitational lensing
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. We intentionally omit the details the average lensing expert would like to see and instead try to ...
متن کاملGravitational Lensing in Astronomy
Deflection of light by gravity was predicted by General Relativity and observationally confirmed in 1919. In the following decades, various aspects of the gravitational lens effect were explored theoretically. Among them were: the possibility of multiple or ring-like images of background sources, the use of lensing as a gravitational telescope on very faint and distant objects, and the possibil...
متن کاملGravitational lensing by gravitational waves
Gravitational lensing by gravitational wave is considered. We notice that although final and initial direction of photons coincide, displacement between final and initial trajectories occurs. This displacement is calculated analytically for the plane gravitational wave pulse. Estimations for observations are discussed.
متن کاملGravitational Lensing in the Universe
Introduction 1 Basic theory 1.1 Deflection of light 1.2 Lensing geometry and various lenses 1.3 Lensing efficiency 2 Compact Objects and Microlensing 2.1 Microlensing 2.2 MACHO searches 2.3 Simulations and observations 2.4 Inhomogeneous Universe 3 Galaxies and Multiple Images 3.1 Multiply-imaged Quasars 3.2 Multiply-imaged radio sources and radio rings 3.3 Galaxies as lenses 3.4 Determination o...
متن کاملIntermediate Strength Gravitational Lensing
Weak lensing is found in the correlations of shear in 104 galaxy images, strong lensing is detected by the obvious distortion of a single galaxy image, whereas intermediate lensing requires detection of less obvious curvature in several neighboring galaxies. Small impact-parameter lensing causes a sextupole distortion whose orientation is correlated with the quadrupole distortion (shear). By lo...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2008
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.78.083003