Item description for Gravitational Lenses (Astronomy and Astrophysics Library) by P. Schneider...
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 Eddington soon afterwards. If the source of the light is sufficiently distant and bright, and if the intervening object is massive enough and near enough to the line of sight, the gravitational field acts like a lens, focusing the light and producing one or more bright images of the source. This book, by renowned researchers in the field, begins by discussing the basic physics behind gravitational lenses: the optics of curved space-time. It then derives the appropriate equations for predicting the properties of these lenses. In addition, it presents up-to-date observational evidence for gravitational lenses and describes the particular properties of the observed cases. The authors also discuss applications of the results to problems in cosmology.
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Est. Packaging Dimensions: Length: 9.25" Width: 6.3" Height: 0.79" Weight: 1.76 lbs.
Release Date Nov 23, 1999
ISBN 3540665064 ISBN13 9783540665069
Reviews - What do customers think about Gravitational Lenses (Astronomy and Astrophysics Library)?
nice confirmation of General Relativity Apr 11, 2005
Gravitational lenses are one of the most beautiful manifestations of Einstein's theory of General Relativity. The book explains how from the equations of GR, a massive star that is in the line of sight between us and a distant bright star can cause the production of multiple images. Several of these have been observed in the visible spectrum. Eloquent images.
Thus, the book also goes into the observational evidence for such lensing. This involves testing the light from the purported images, to affirm whether or not the spectral properties of the images are similar enough that they are in fact images of the same star. Are the redshifts the same, for example?
It is also shown that the lensing also gives us a diagnostic handle on the star doing the lensing. Very useful, as the star might be so distant in its own right as to preclude several other types of analysis.