By Alexandre Barreira

ISBN-10: 3319336959

ISBN-13: 9783319336954

ISBN-10: 3319336967

ISBN-13: 9783319336961

This special thesis covers all points of theories of gravity past Einstein’s common Relativity, from establishing the equations that describe the evolution of perturbations, to identifying the best-fitting parameters utilizing constraints just like the microwave heritage radiation, and finally to the later levels of constitution formation utilizing state of the art N-body simulations and evaluating them to observations of galaxies, clusters and different large-scale buildings. This really ground-breaking paintings places the examine of transformed gravity types at the related footing because the commonplace version of cosmology. because the discovery of the accelerating enlargement of the Universe, marked via the awarding of the 2011 Nobel Prize in Physics, there was a growing to be curiosity in realizing what drives that acceleration. One attainable clarification lies in theories of gravity past Einstein’s common Relativity. This thesis addresses all features of the matter, an method that's the most important to keeping off almost certainly catastrophic biases within the interpretation of upcoming observational missions.

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**Additional info for Structure Formation in Modified Gravity Cosmologies**

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Jain B, Joyce A, Thompson R, Upadhye A, Battat J et al (2013) Novel probes of gravity and dark energy. 5389 37. Berti E, Barausse E, Cardoso V, Gualtieri L, Pani P et al (2015) Testing general relativity with present and future astrophysical observations. 07274 38. Dvali G, Hofmann S, Khoury J (2007) Degravitation of the cosmological constant and graviton width. Phys Rev D 76:084006. arXiv:hep-th/0703027 39. Koyama K (2008) The cosmological constant and dark energy in braneworlds. Gen Rel Grav 40:421–450.

Phys Rev D 90(12):123521. 0969 73. Barreira A, Brax P, Clesse S, Li B, Valageas P (2015) K-mouflage gravity models that pass solar system and cosmological constraints. 01493 74. Baker T, Ferreira PG, Skordis C, Zuntz J (2011) Towards a fully consistent parameterization of modified gravity. Phys Rev D 84:124018. 0491 75. Baker T, Ferreira PG (2012) The parameterized post-Friedmann framework for theories of modified gravity: concepts, formalism and examples. 2117 76. Caldwell R, Cooray A, Melchiorri A (2007) Constraints on a new post-general relativity cosmological parameter.

In our analysis of these models, our first steps will always involve determining the regions of the parameter space that are consistent with the CMB, BAO and SNIa data. The CMB predictions presented in this thesis for these models were the first to be shown in the literature. Then, armed with the best-fitting parameters, we focus on the model predictions for nonlinear structure formation with the aid of N-body simulations, as well as with some analytical methods assuming spherically symmetric configurations.

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