Gravitational lenses : observational status.
Abstract
Four reported examples of the gravitational-lens effect are characterized from an astrophysical perspective. The criteria based on the Einstein equivalence principle are reviwed, and the objects are discussed: the twin quasar 0957+561, the 'triple' quasar 1115+080, the double quasar 2345+0007, and the triple source 2016+112. All four objects are found to meet the criteria, and the importance of apparent discrepancies among them is demonstrated.
- Publication:
-
Comments on Astrophysics
- Pub Date:
- February 1984
- Bibcode:
- 1984ComAp..10...75B
- Keywords:
-
- Gravitational Lenses;
- Quasars;
- Space Observations (From Earth);
- Einstein Equations;
- Very Long Base Interferometry;
- Astrophysics