Abstract
view Abstract Citations (2) References (8) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Lens Effect of a Big Spherical Inhomogeneity in the Linear Approximation Moreno, Jose ; Portilla, Miquel Abstract The authors address 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, spherically symmetric perturbation in an 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. Publication: The Astrophysical Journal Pub Date: April 1990 DOI: 10.1086/168545 Bibcode: 1990ApJ...352..399M Keywords: Computational Astrophysics; Gravitational Lenses; Minkowski Space; Angular Momentum; Approximation; Linear Equations; Luminosity; Astrophysics; COSMOLOGY; GRAVITATIONAL LENSES full text sources ADS |
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