Effects of modified gravity on the turnaround radius in cosmology

Abstract

We revisit the concept of turnaround radius in cosmology, in the context of modified gravity. While preliminary analyses were limited to scalar-tensor/$F(R)$ gravity, we extend the definition and the study of this quantity to a much broader class of theories including also quantum $R^2$ gravity. The turnaround radius is computed in terms of the parameters of the theory and it is shown that a deviation not larger than 10\% of this quantity from its value in Einstein's theory could constrain the model parameters and even rule out some current theories.

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Cited by in corpus (13)

• The halo model for cosmology: a pedagogical review
• The splashback radius in symmetron gravity
• Relation between the Turnaround radius and virial mass in $f(R)$ model
• Turnaround radius of galaxy clusters in N-body simulations
• Turnaround size of non-spherical structures
• Turnaround density as a probe of the cosmological constant
• Turnaround physics beyond spherical symmetry
• The maximum turnaround radius for axisymmetric cosmic structures
• Dark matter halos modeled by polytropic spheres influenced by the relict cosmological constant and trapping polytropes forming supermassive black holes
• Turnaround density evolution encodes cosmology in simulations
• Turnaround radius in scalar-tensor gravity with quasilocal mass
• Non-singular non-flat universes
• Turnaround Radius for charged particles in the Reissner-Nordström deSitter spacetime