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A Study of Abell 2146: Dark and Luminous
The universe is a highly dynamic system. Under the primary inﬂuence of gravity, matter in the universe clumped together to create the structure we currently observe with our telescopes. Gravity formed objects on vastly ...
Extending and Implementing the Self-Calibration of Intrinsic Alignments of Galaxies to Current and Future Weak Lensing Surveys
This dissertation is about extending and applying the self-calibration method for mitigation of intrinsic alignments (IAs) of galaxies. These IA correlations are due to galaxy formation earlier processes that act as a ...
Testing the Dark Sector Versus Modified Gravity Models in Cosmology
This dissertation studies cosmological and astrophysical tests of gravity theories and the dark sectors. We focus on three tests. All of them are promising for future observations. The first test is about tensor-mode ...
Weak Gravitational Lensing Shear and Magnification Analysis of Hydrodynamic Simulations and Application to Weak Lensing Data
In the main part of this dissertation we study the impact of baryonic processes and massive neutrinos on weak lensing peak statistics that can be used to constrain cosmological parameters. We use the BAHAMAS simulations, ...
The Structure and Environment of Galaxy Clusters in Simulations and Observations
Galaxy clusters are powerful testing grounds for cosmology. They are the largest, most massively bound objects in the Universe and can give us deep insights on how baryons, dark matter, and dark energy impacts on the ...