Possible measurement of Quintessence and density parameter using strong gravitational lensing events

Abstract

We propose a possible measurement of the time variability of the vacuum energy using strong gravitational lensing events. As an example we take an Einstein cross lens HST 14176+5226 and demonstrate that the measurement of the velocity dispersion with the accuracy of $\pm$ 5 km/sec will have a chance to determine the time dependence of the vacuum energy as well as the density parameter with the accuracy of order 0.1 if one fixes the lens model.

5 pages, 1 figure, accepted for publication in Progress of Theoretical Physics

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• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• The Top Ten List of Gravitational Lens Candidates from the HST Medium Deep Survey

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