The lens effect of a big spherical inhomogeneity in the linear approximation

Details The lens effect of a big spherical inhomogeneity in the linear approximation The lens effect of a big spherical inhomogeneity in the linear approximation

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...352..399m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 352, April 1, 1990, p. 399-406. Research supported by CICYT.

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Computational Astrophysics, Gravitational Lenses, Minkowski Space, Angular Momentum, Approximation, Linear Equations, Luminosity

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The paper addresses a large gravitational lens, of dimensions comparable with observer-lens-source distances, for arbitrary lens-observer-source angles. The lens is approximated by a small, pressureless, spsherically symmetric perturbation in a Einstein-de Sitter universe. The deflection angle contains essential terms which do not appear when the lens is approximated by an isolated body in a Minkowskian space. These terms should be considered to study the optical appearance of the inhomogeneity. The lens equation explicitly conserves brightness over the whole celestial sphere of the observer.

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