Implications from Simulated Strong Gravitational Lensing Systems: Constraining Cosmological Parameters Using Gaussian Processes
نویسندگان
چکیده
منابع مشابه
Cosmological Parameters from Multiple - arc Gravitational Lensing Systems I : smooth lensing potentials
We describe a new approach for the determination of cosmological parameters using gravitational lensing systems with multiple arcs. We exploit the fact that a given cluster can produce multiple arcs from sources over a broad range in redshift. The coupling between the critical radius of a single arc and the projected mass density of the lensing cluster can be avoided by considering the relative...
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Current efforts in observational cosmology are focused on characterizing the mass-energy content of the universe. We present results from a geometric test based on strong lensing in galaxy clusters. Based on Hubble Space Telescope images and extensive ground-based spectroscopic follow-up of the massive galaxy cluster Abell 1689, we used a parametric model to simultaneously constrain the cluster...
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Context. Observations of the cosmic microwave background, light element abundances, large-scale distribution of galaxies, and distant supernovae are the primary tools for determining the cosmological parameters that define the global structure of the Universe. Aims. Here we illustrate how the combination of observations related to strong gravitational lensing and stellar dynamics in elliptical ...
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Measured time delays between the images of a gravitationally lensed source can lead to a determination of the Hubble constant (Ho), but only if the lensing mass distribution is well understood. The inability to sufficiently constrain galaxy mass models results in large uncertainties on the derived Ho, and severely hampers the cosmological application of this otherwise elegant method. At the sam...
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We study the relation between the gravitational lensing observables and the lens model and the cosmological parameters. We estimate the sensitivity of the lensing observables to the lens model and to the cosmological parameters. We show that the observables are primarily dependent on the lens model, while the dependence on cosmological parameters is minor (especially so for the dark energy para...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2019
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab4bc3