Gravitational Lenses
Light observed from distant objects is found to be deflected by the gravitational field of massive objects near the line of sight - an effect predicted by Einstein in his first paper setting forth the general theory of relativity, and confirmed by Eddingt
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Gravitational Lenses With 112 Figures
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Dr. Peter Schneider Max-Planck-Institut fijr Astrophysik Karl-Schwarzschild-Strasse 1 85748 Garching, Germany
Professor Dr. Jiirgen Ehlers Max-Planck-Institut fijr Gravitationsphysik Albert -Einstein-Institut Schlaatzweg 1 14473 Potsdam, Germany
Dr. Emilio E. Falco Harvard-Smithsonian Center for Astrophysics 60 Garden Street Cambridge, MA 02138, USA
Cover picture: When a source, e.g., a QSO, lies behind a foreground galaxy, its light boundle is affected by the individual stars ofthis galaxy. This microlensing effect, so far observed in at least one QSO (see Sect. 12.4), leads to a change in the flux we observe from the source, relative to an lInlensed source. The flux magnification depends sensitively on the position of the source relative to the stars in the galaxy. Here we see the magnification as a function of the relative source position
