<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Non-linear structure formation in models of Dark Energy and Modified Gravity"^^ . "In this thesis we investigate the importance of non-linear structure formation on the\r\ndetermination of cosmological parameters for models beyond the standard ΛCDM\r\nscenario. Future galaxy surveys will be able to determine the two-point correlation\r\nfunction of more than 10^7 galaxies in a very precise way. Extracting the information encoded in this function at small scales, allows us to constrain the underlying\r\ncosmological model. Here we consider different models beyond ΛCDM: Coupled\r\nDark Energy, Growing Neutrino Quintessence, Effective Field Theory, Horndeski\r\ntheory and general phenomenological parameterizations of Modified Gravity. To\r\nstudy the non-linear effects in these models, we use different methodologies: fitting formulae, semi-analytic prescriptions based on the Halo model, resummation\r\nmethods in cosmological perturbation theory and specialized N-body simulations.\r\nIn order to forecast the constraining power of next-generation surveys, such as Euclid, SKA and DESI, we developed a code that uses the Bayesian Fisher matrix for-\r\nmalism to compute the inferred error on the parameters for Galaxy Clustering and\r\nWeak Lensing observables. For Modified Gravity we study the effect that different\r\nparameterizations and different non-linear prescriptions have on the Fisher forecasts. We obtain the best combination of redshift-binned parameters which will\r\nbe measured by future experiments. Within the Coupled Dark Energy scenario\r\nwe perform the first forecasts using fitting formulae from N-body simulations and\r\nshow that using non-linear scales improves the constraints by more than an order\r\nof magnitude compared to linear forecasts. In the Growing Neutrino Quintessence\r\nmodel, we use non-Newtonian N-body simulations to study the different regimes\r\nfor the dynamics of neutrino lumps. We show that there are viable cosmologies\r\nwithin this model and that the lump interactions induce a heating of the neutrino\r\nfluid. Finally, we also study analytically the non-linear corrections to the power\r\nspectrum in the case of Horndeski theory under the quasistatic approximation. To\r\nachieve this, we apply a resummation method for higher order perturbation theory,\r\nwhich had so far only been employed within the standard cosmological model. The\r\nmain message of this thesis is that non-linear structure formation has a significant\r\nimpact on cosmological parameter estimation. In order to discriminate between\r\ncompeting theories, using forthcoming data, we need to take non-linearities and\r\ntheir implications into account."^^ . "2017" . . . . . . . "Santiago"^^ . "Casas Castro"^^ . "Santiago Casas Castro"^^ . . . . . . "Non-linear structure formation in models of Dark Energy and Modified Gravity (PDF)"^^ . . . "PhD-Thesis-Santiago_Casas-20170502-Print.pdf"^^ . . . "Non-linear structure formation in models of Dark Energy and Modified Gravity (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Non-linear structure formation in models of Dark Energy and Modified Gravity (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Non-linear structure formation in models of Dark Energy and Modified Gravity (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Non-linear structure formation in models of Dark Energy and Modified Gravity (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Non-linear structure formation in models of Dark Energy and Modified Gravity (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #23120 \n\nNon-linear structure formation in models of Dark Energy and Modified Gravity\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .