Browsing Ishak-Boushaki, Mustapha by Title
Now showing items 6-12 of 12
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Large-Scale Growth Evolution in the Szekeres Inhomogeneous Cosmological Models with Comparison to Growth Data
(American Physical Society, 2012-12-06)We use the Szekeres inhomogeneous cosmological models to study the growth of large-scale structure in the universe including nonzero spatial curvature and a cosmological constant. In particular, we use the Goode and ... -
Self-Calibrating the Gravitational Shear-Intrinsic Ellipticity-Intrinsic Ellipticity Cross-Correlation
(2012-06-01)We extend the 3-point intrinsic alignment self-calibration technique to the gravitational shear-intrinsic ellipticity-intrinsic ellipticity (GII) bispectrum. While significantly decreased from using cross-correlations ... -
Self-Calibration for Three-Point Intrinsic Alignment Autocorrelations in Weak Lensing Surveys
(2012-06-08)The weak lensing signal (cosmic shear) has been shown to be strongly contaminated by the various types of galaxy intrinsic alignment (IA) correlations, which poses a barrier to precision weak lensing measurements. The ... -
Self-Calibration Technique for Three-Point Intrinsic Alignment Correlations in Weak Lensing Surveys
(2011-11-15)The intrinsic alignment (IA) of galaxies has been shown to be a significant barrier to precision cosmic shear measurements. Recently, Zhang proposed a self-calibration technique for the power spectrum to calculate the ... -
Spatial Curvature and Cosmological Tests of General Relativity
(American Physical Society, 2012-03-23)It is well-known that allowing for spatial curvature affects constraints on cosmological parameters such as the dark energy equation of state parameters. Here we study the effect of curvature on constraints on parameters ... -
Stringent Restriction from the Growth of Large-Scale Structure on Apparent Acceleration in Inhomogeneous Cosmological Models
(2013-12-19)Probes of cosmic expansion constitute the main basis for arguments to support or refute a possible apparent acceleration due to different expansion rates in the Universe as described by inhomogeneous cosmological models. ... -
Testing Gravity Theories Using Tensor Perturbations
(American Physical Society, 2016-12-21)Primordial gravitational waves constitute a promising probe of the very early Universe and the laws of gravity. We study in this work changes to tensor-mode perturbations that can arise in various proposed modified gravity ...