Possible measurement of Quintessence and density parameter using strong gravitational lensing events
General Relativity and Quantum Cosmology
2009-10-31 v2 Astrophysics
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 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.
Cite
@article{arxiv.gr-qc/0011083,
title = {Possible measurement of Quintessence and density parameter using strong gravitational lensing events},
author = {Toshifumi Futamase and Shijun Yoshida},
journal= {arXiv preprint arXiv:gr-qc/0011083},
year = {2009}
}
Comments
5 pages, 1 figure, accepted for publication in Progress of Theoretical Physics