Possible Method to Reconstruct the Cosmic Equation of State from Strong Gravitational Lensing Systems

Details Possible Method to Reconstruct the Cosmic Equation of State from Strong Gravitational Lensing Systems Possible Method to Reconstruct the Cosmic Equation of State from Strong Gravitational Lensing Systems

2001-04-16

arxiv.org/abs/astro-ph/0104253v1

Astronomy and Astrophysics

Astrophysics

12 pages including 3 figures, to be published in Prog. Theor. Phys

Scientific paper

10.1143/PTP.105.707

A possible method to reconstruct the cosmic equation of state using strong gravitational lensing systems is proposed. The feasibility of the method is investigated by carrying out the reconstruction on the basis of a simple Monte-Carlo simulation. We show that the method can work and that the cosmic equation of state $w(z)$ can be determined within errors of $\Delta w\sim \pm0.1$ -- $\pm0.2$ when a sufficiently large number of lensing systems ($N\sim 20$) for $z\simlt 1$ are precisely measured. Statistics of lensed sources in a wide and deep survey like the SDSS are also briefly discussed.

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