text: [PDF] The Dark side of gravity: Modified theories of gravity | Semantic Scholar
  Corpus ID: 117019793
  @article{Lobo2008TheDS,
  title={The Dark side of gravity: Modified theories of gravity},
  author={Francisco S. N. Lobo},
  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 has been stated that cosmology has entered a 'golden age', in which high-precision observational data have confirmed with startling evidence that the Universe is undergoing a phase of accelerated expansion. Several candidates, responsible for this expansion, have been proposed in the literature, in…
  The astrophysical data of the last two decades have allowed cosmologists to conclude that the present Universe is accelerating. The research carried out to find the origin of this phenomenon has led…
  A central theme in cosmology is the perplexing fact that the Universe is undergoing an accelerating expansion. The latter, one of the most important and challenging current problems in cosmology,…
  Generalized ƒ(R,Φ, X) Gravity and the Late-Time Cosmic Acceleration
  S. Bahamonde, C. Boehmer, F. Lobo, D. Sáez-Gómez
  High-precision observational data have confirmed with startling evidence that the Universe is currently undergoing a phase of accelerated expansion. This phase, one of the most important and…
  Cosmography and large scale structure by f(R) gravity: new results
  S. Capozziello, V. Salzano
  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…
  Can cosmic acceleration be caused by exotic massless particles
  To describe dark energy we introduce a fluid model with no free parameter on the microscopic level. The constituents of this fluid are massless particles which are a dynamical realization of the…
  The review aims at providing an overall picture of the subject and an entry point to students and researchers interested in joining the field and a quick reference to recent results and constraints on testing gravity at cosmological scales.
  P. Avelino, T. Barreiro, +10 authors A. M. M. Trindade
  Several observational probes are reviewed—including gravitational lensing, galaxy clusters, cosmic microwave background temperature and polarization, supernova and baryon acoustic oscillations measurements—and their relevance in constraining the cosmological description of the Universe is reviewed.
  Constraining $f(R)$ Gravity by the Large-Scale Structure
  I. D. Martino, M. D. Laurentis, S. Capozziello
  Over the past few decades, general relativity and the concordance ΛCDM model have been successfully tested using several different astrophysical and cosmological probes based on large datasets…
  Cosmological anisotropy from non-comoving dark matter and dark energy
  We consider a cosmological model in which the two major fluid components of the Universe, dark energy and dark matter, flow with distinct four-velocities. This cosmological configuration is…
  On the stability of the cosmological solutions in f(R, G) gravity
  'Alvaro de la Cruz-Dombriz, D. S'aez-G'omez
  Modified gravity is one of the most promising candidates for explaining the current accelerating expansion of the Universe, and even its unification with the inflationary epoch. Nevertheless, the…
  Interplay between the small and the large scale structure of spacetime
  M. Modgil
  Existence of frame invariant, maximum, time interval $T$, length $L$, and mass $M$ is postulated. In the de Sitter universe - (1) the life span of universe, (2) the circumference of universe at the…
  X-ray observations of Clusters of Galaxies
  X-ray observations of clusters provide key information on the dark matter, on the formation of structures in the Universe, and can be used to constrain the cosmological parameters. I review our…
  Introduction 1. Elementary principles 2. The tensor calculus 3. The law of gravitation 4. Relativity mechanics 5. Curvature of space and time 6. Electricity 7. World geometry Supplementary notes…