Cosmography and large scale structure by f(R) gravity: new results

  title={Cosmography and large scale structure by f(R) gravity: new results},
  author={Salvatore Capozziello and Vincenzo Salzano},
  journal={Advances in Astronomy},
The so-called 𝑓(𝑅)-gravity has recently attracted a lot of interest since it could be, in principle, able to explain the accelerated expansion of the Universe without adding unknown forms of dark energy/dark matter but, more simply, extending the General Relativity by generic functions of the Ricci scalar. However, apart several phenomenological models, there is no final 𝑓(𝑅)-theory capable of fitting all the observations and addressing all the issues related to the presence of dark energy… Expand
f(R) gravity modifications: from the action to the data
This work tries to reformulate f(R) Lagrangian terms as explicit functions of the redshift, i.e., as f(z), including new terms which would allow for deviations from the consensus cosmological model, the $$\varLambda $$ΛCDM model. Expand
Cosmographic Constraints and Cosmic Fluids
The problem of reproducing dark energy effects is reviewed here with particular interest devoted to cosmography. We summarize some of the most relevant cosmological models, based on the assumptionExpand
Eddington–Born–Infeld cosmology: a cosmographic approach, a tale of doomsdays and the fate of bound structures
The Eddington-inspired-Born–Infeld scenario (EiBI) can prevent the big bang singularity for a matter content whose equation of state is constant and positive. In a recent paper [Bouhmadi-Lopez et al.Expand
Gravitational Physics: From Quantum to Waves
Gravitational interaction is widely considered one of the most challenging topics of physics. Despite of the undoubtful successes of General Relativity, the lack of a self-consistent theory, capableExpand
Stability of a noncanonical scalar field model during cosmological date
Using the noncanonical model of scalar field, the cosmological consequences of a pervasive, self-interacting, homogeneous, and rolling scalar field are studied. In this model, the scalar fieldExpand
A new comparison between holographic dark energy and standard $$\varLambda $$-cosmology in the context of cosmography method
The cosmography method is a model-independent technique used to reconstruct the Hubble expansion of the Universe at low redshifts. In this method, using the Hubble diagrams from Type Ia SupernovaeExpand
Rational approximations of $f(R)$ cosmography through Pad\'e polynomials
We consider high-redshift $f(R)$ cosmography adopting the technique of polynomial reconstruction. In lieu of considering Taylor treatments, which turn out to be non-predictive as soon as $z>1$, weExpand
Cosmological dynamics with modified induced gravity on the normal DGP branch
Abstract In this Letter we investigate cosmological dynamics on the normal branch of a DGP-inspired scenario within a phase space approach where induced gravity is modified in the spirit of f ( R )Expand
Thermodynamics of Viscous Dark Energy in DGP Setup
We investigate thermodynamics of viscous dark energy interacting with dark matter in a DGP braneworld. We show that the Friedmann equation in this setup can be rewritten as the first law ofExpand
Matter Instability in Theories with Modified Induced Gravity
Matter stability is a necessary condition to have a cosmologically viable model. Modified gravity in the spirit of theories suffers from matter instability in some subdomains of the model parameterExpand


Extended theories of gravity and their cosmological and astrophysical applications
Astrophysical observations are pointing out huge amounts of “dark matter” and “dark energy” needed to explain the observed large scale structure and cosmic dynamics. The emerging picture is aExpand
Disappearing cosmological constant in f(R) gravity
For higher-derivative f(R) gravity, where R is the Ricci scalar, a class of models is proposed, which produce viable cosmology different from the ACDM at recent times and satisfy cosmological, SolarExpand
Reconciling dark energy models with f(R) theories
Higher-order theories of gravity have recently attracted a lot of interest as alternative candidates to explain the observed cosmic acceleration without the need of introducing any scalar field. AExpand
Can F(R)-gravity be a viable model: the universal unification scenario for inflation, dark energy and dark matter
We review on the viability of $F(R)$-gravity. We show that recent cosmic acceleration, radiation/matter-dominated epoch and inflation could be realized in the framework of $F(R)$-gravity in theExpand
Analysis of rotation curves in the framework of Rn gravity
ABSTRACT We present an analysis of a devised sample of Rotation Curves (RCs), aimed atchecking the consequences of a modified f(R) gravity on galactic scales. Originallymotivated by the the darkExpand
We review various modified gravities considered as gravitational alternative for dark energy. Specifically, we consider the versions of f(R), f(G) or f(R, G) gravity, model with non-linearExpand
The Dark side of gravity: Modified theories of gravity
Modern astrophysical and cosmological models are faced with two severe theoretical difficulties, that can be summarized as the dark energy and the dark matter problems. Relative to the former, it hasExpand
Low surface brightness galaxy rotation curves in the low energy limit of Rn gravity: no need for dark matter?
We investigate the possibility that the observed flatness of the rotation curves of spiral galaxies is not evidence for the existence of dark matter haloes, but rather a signal of the breakdown ofExpand
Observational signatures of f(R) dark energy models that satisfy cosmological and local gravity constraints
We discuss observational consequences of f(R) dark energy scenarios that satisfy local gravity constraints (LGC) as well as conditions of the cosmological viability. The model we study is given byExpand
The apparent magnitude-redshift data of Type Ia supernovae (SNe Ia) call for modifications in the standard model energy densities. Under the circumstance that this modification cannot be limited toExpand