Gravitational lenses as astrophysical tools
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Observations of GL systems can provide a wealth of astrophysical information. As F. Zwicky noted as early as one-half century ago [ZW37.1], GLs (1.) furnish an additional test of General Relativity; (2.) allow us to see fainter or more distant sources; and (3.) provide a means to estimate the mass of galaxies, of clusters of galaxies, and of unseen, massive aggregates of dark matter.
KeywordsLight Curve Very Long Baseline Interferometry Cosmic String Critical Curve Lens Model
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