Possible Measurement of Quintessence and Density Parameter Using Strong Gravitational Lensing Events | Zendy

Toshifumi Futamase | Zendy; Shōji Yoshida | Zendy

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Possible Measurement of Quintessence and Density Parameter Using Strong Gravitational Lensing Events

Author(s) -

Toshifumi Futamase,

Shōji Yoshida

Publication year - 2001

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.105.887

Subject(s) - physics , quintessence , gravitational lens , weak gravitational lensing , dark energy , lens (geology) , strong gravitational lensing , gravitation , astrophysics , computational physics , cosmology , classical mechanics , optics , redshift , galaxy

We propose a possible measurement of the time variability of the vacuumenergy using strong gravitational lensing events. As an example we take anEinstein cross lens HST 14176+5226 and demonstrate that the measurement of thevelocity dispersion with the accuracy of $\pm$ 5 km/sec will have a chance todetermine the time dependence of the vacuum energy as well as the densityparameter with the accuracy of order 0.1 if one fixes the lens model.Comment: 5 pages, 1 figure, accepted for publication in Progress of Theoretical Physic

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