Perturbed f(R) gravity coupled with neutrinos: exploring cosmological implications
arxiv(2024)
摘要
We conduct a thorough examination of cosmological parameters within the
context of f(R) gravity coupled with neutrinos, leveraging a diverse array of
observational datasets, including Cosmic Microwave Background (CMB), Cosmic
Chronometers (CC), Baryon Acoustic Oscillations (BAO), and Pantheon supernova
data. Our analysis unveils compelling constraints on pivotal parameters such as
the sum of neutrino masses (∑ m_ν), the interaction strength parameter
(Γ), sound speed (c_s), Jean's wavenumbers (k_J), redshift of
non-relativistic matter (z_ nr), and the redshift of the
Deceleration-Acceleration phase transition (z_ DA). The incorporation of
neutrinos within the f(R) gravity framework emerges as a key factor
significantly influencing cosmic evolution, intricately shaping the formation
of large-scale structures and the dynamics of cosmic expansion. Additionally, a
detailed analysis of bulk flow direction and amplitude across various redshifts
provides valuable insights into the nature of large-scale structures. A notable
aspect of our model is the nuanced integration of f(R) gravity theory with
neutrinos, representing a distinctive approach to unraveling cosmological
phenomena. This framework, unlike previous models, explicitly considers the
impact of neutrinos on gravitational interactions, the formation of large-scale
structures, and the overarching dynamics of cosmic expansion within the f(R)
gravity paradigm. Furthermore, our study addresses the Hubble tension problem
by comparing H_0 measurements within our model, offering a potential avenue
for reconciling discrepancies. Our findings not only align with existing
research but also contribute novel perspectives to our understanding of dark
energy, gravitational interactions, and the intricate challenges posed by the
Hubble tension.
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