2022/06/06 by Shambel Sahlu, Sahlu, Shambel, Endalkachew Tsegaye +1
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #General Relativity and Quantum Cosmology (gr-qc) #Solar and Space Plasma Dynamics
paper · pdf · doi:10.48550/arxiv.2206.02517
openalex publication_date 2022/06/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this manuscript, we studied the accelerated expansion history of the universe and the formations of large-scale structures using f(Q) gravity model. The expansion rate of the universe within distance modulus and redshift has been performed in f(Q) gravity. This work is also devoted to investigating the linear cosmological perturbations in the f(Q) gravity model using the 1 + 3 covariant formalism. The scalar and harmonic decomposition techniques are applied to find the evolution equation. The growth of matter density contrasts is analyzed with redshift z. Using the nonmetricity modified gravity model which is f (Q) = Q+αQn, the accelerating expanding universe and the formations of the large-scale structures have been explained. The quasi-static approximation technique is applied to analyze the growth of matter contrasts. The growth of density contrast is studied within the dust and radiation-dominated universe in the presence of nonmetricity gravity.