Mon. Not. R. Astron. Soc., 452, 2423-2433 (2015/September-3)
Cosmological test using strong gravitational lensing systems.
YUAN C.C. and WANG F.Y.
Abstract (from CDS):
As one of the probes of universe, strong gravitational lensing systems allow us to compare different cosmological models and constrain vital cosmological parameters. This purpose can be reached from the dynamic and geometry properties of strong gravitational lensing systems, for instance, time-delay Δτ of images, the velocity dispersion σ of the lensing galaxies and the combination of these two effects, Δτ/σ2. In this paper, in order to carry out one-on-one comparisons between ΛCDM universe and Rh = ct universe, we use a sample containing 36 strong lensing systems with the measurement of velocity dispersion from the Sloan Lens Advanced Camera for Surveys (SLACS) and Lens Structure and Dynamic survey (LSD) survey. Concerning the time-delay effect, 12 two-image lensing systems with Δτ are also used. In addition, Monte Carlo simulations are used to compare the efficiency of the three methods as mentioned above. From simulations, we estimate the number of lenses required to rule out one model at the 99.7 percent confidence level. Comparing with constraints from Δτ and the velocity dispersion σ, we find that using Δτ/σ2 can improve the discrimination between cosmological models. Despite the independence tests of these methods reveal a correlation between Δτ/σ2 and σ, Δτ/σ2 could be considered as an improved method of σ if more data samples are available.
© 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)
gravitational lensing: strong - dark energy
The reference for Lehar 1993 is 1993AJ....105..847L (not ApJ). Table 2: the system SDSS J1206+4332 does not appear in reference 17.
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