Paz, D.

Probing cosmology with voids in the large scale structure

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Wednesday 10th
Probing cosmology with voids in the large scale structure
We present an analysis of the abundance of void regions identified across various simulations with different cosmological parameters and gravity models. In particular, our study investigates the dependence of void shapes on fundamental cosmological parameters, such as matter density and sigma_8 within the framework of LCDM simulations. Additionally, we explore modified gravity models, including the chameleon-screened Hu-Sawicki f(R) model and the normal-branch Dvali-Gabadadze-Porrati (nDGP) model, to understand their impact on void statistics. Utilizing a model emulator, we delve into the constraining power of studying void abundance and shape within the context of redshift surveys. Through this research, we aim to gain valuable insights into the interplay between void properties and cosmological parameters, shedding light on the potential implications for modified gravity theories.