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Strongly lensed repeating fast radio bursts as precision probes of the universe
TLDR
It is shown that, within the flat ΛCDM model, the Hubble constant H0 can be constrained with a ~0.91% uncertainty from 10 such systems probably observed with the square kilometer array (SKA) in <30 years.
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IS THERE EVIDENCE FOR DARK ENERGY EVOLUTION?
Recently, Sahni et al. combined two independent measurements of H(z) from BAO data with the value of the Hubble constant H 0 = H ( z = 0 ) ?> in order to test the cosmological constant hypothesis by…
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MODEL-INDEPENDENT ESTIMATIONS FOR THE CURVATURE FROM STANDARD CANDLES AND CLOCKS
Model-independent estimations for the spatial curvature of the universe not only provide a test for the fundamental assumption of the Copernican principle, but also can effectively break the…
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Cosmic opacity: Cosmological-model-independent tests and their impact on cosmic acceleration
With assumptions that the violation of the distance-duality relation entirely arises from nonconservation of the photon number and that the absorption is frequency independent in the observed…
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COSMOLOGICAL-MODEL-INDEPENDENT TESTS FOR THE DISTANCE–DUALITY RELATION FROM GALAXY CLUSTERS AND TYPE Ia SUPERNOVA
We perform a cosmological-model-independent test for the distance–duality (DD) relation η(z) = DL(z)(1 + z)−2/DA(z), where DL and DA are the luminosity distance and angular diameter distance,…
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Model-independent Constraints on Cosmic Curvature and Opacity
In this paper, we propose to estimate the spatial curvature of the universe and the cosmic opacity in a model-independent way with expansion rate measurements, H(z), and type Ia supernova (SNe Ia).…
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Cosmology-independent Estimate of the Fraction of Baryon Mass in the IGM from Fast Radio Burst Observations
The excessive dispersion measure (DM) of fast radio bursts (FRBs) has been proposed to be a powerful tool to study intergalactic medium (IGM) and to perform cosmography. One issue is that the…
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Examining the cosmic acceleration with the latest Union2 supernova data
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THE DISTANCE DUALITY RELATION FROM STRONG GRAVITATIONAL LENSING
Under very general assumptions of the metric theory of spacetime, photons traveling along null geodesics and photon number conservation, two observable concepts of cosmic distance, i.e., the angular…
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REVISITING STUDIES OF THE STATISTICAL PROPERTY OF A STRONG GRAVITATIONAL LENS SYSTEM AND MODEL-INDEPENDENT CONSTRAINT ON THE CURVATURE OF THE UNIVERSE
In this paper, we use a recently compiled data set, which comprises 118 galactic-scale strong gravitational lensing (SGL) systems to constrain the statistical property of the SGL system as well as…
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