Growth of structures using redshift space distortion in Cosmology
arXiv:2310.09159 · doi:10.1093/mnras/stae103
Abstract
Cosmology faces a pressing challenge with the Hubble constant () tension, where the locally measured rate of the Universe's expansion does not align with predictions from the cosmic microwave background (CMB) calibrated with CDM model. Simultaneously, there is a growing tension involving the weighted amplitude of matter fluctuations, known as tension. Resolving both tensions within one framework would boost confidence in any one particular model. In this work, we analyse constraints in gravity, a framework that shows promise in shedding light on cosmic evolution. We thoroughly examine prominent gravity models using a combination of data sources, including Pantheon+ (SN), cosmic chronometers (CC), baryonic acoustic oscillations (BAO) and redshift space distortion (RSD) data. We use these models to derive a spectrum of and values, aiming to gauge their ability to provide insights into, and potentially address, the challenges posed by the and tensions.
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