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Št. zadetkov: 6
ǂThe ǂparameter space of cubic Galileon models for cosmic acceleration
Emilio Bellini, Raul Jimenez
Izvirni znanstveni članek
Oznake: cosmology;Hubble parameter;age of the Universe;Bayesian methods;
We use recent measurements of the expansion history of the universe to place constraints on the parameter space of cubic Galileon models, in particular we concentrate on those models which contain the simplest Galileon term plus a linear potential. This gives strong constraints on the Lagrangian of ...
Leto: 2013 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Signatures of Horndeski gravity on the dark matter bispectrum
Emilio Bellini, Raul Jimenez, Licia Verde
Izvirni znanstveni članek
Oznake: modified gravity;power spectrum;non-gaussianity;dark energy;bispectrum;
We present a detailed study of second-order matter perturbations for the general Horndeski class of models. Being the most general scalar-tensor theory having second-order equations of motion, it includes many known gravity and dark energy theories and General Relativity with a cosmological constant ...
Leto: 2015 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Constraints on deviations from [lambda]CDM within Horndeski gravity
Emilio Bellini, Antonio J. Cuesta, Raul Jimenez, Licia Verde
Izvirni znanstveni članek
Oznake: modified gravity;dark energy;cosmology;cosmological constraints;CMB;large-scale structure;
Recent anomalies found in cosmological datasets such as the low multipoles of the Cosmic Microwave Background or the low redshift amplitude and growth of clustering measured by e.g., abundance of galaxy clusters and redshift space distortions in galaxy surveys, have motivated explorations of models ...
Leto: 2016 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Erratum: Constraints on deviations from [lambda]CDM within Horndeski gravity
Emilio Bellini, Antonio J. Cuesta, Raul Jimenez, Licia Verde
Izvirni znanstveni članek
Oznake: modified gravity;dark energy;cosmology;cosmological constraints;CMB;large-scale structure;erratum;
Leto: 2016 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Early cosmology constrained
Licia Verde, Emilio Bellini, Cassio Pigozzo, Alan F. Heavens, Raul Jimenez
Izvirni znanstveni članek
Oznake: modified gravity;dark energy;cosmology;cosmological constraints;neutrinos;CMB;large-scale structure;
We investigate our knowledge of early universe cosmology by exploring how much additional energy density can be placed in different components beyond those in the ΛCDM model. To do this we use a method to separate early- and late-universe information enclosed in observational data, thus markedly red ...
Leto: 2017 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Hiding neutrino mass in modified gravity cosmologies
Nicola Bellomo, Emilio Bellini, Bin Hu, Raul Jimenez, Carlos Pena-Garay, Licia Verde
Izvirni znanstveni članek
Oznake: modified gravity;dark energy;cosmology;cosmological constraints;neutrinos;CMB;large-scale structure;
Cosmological observables show a dependence with the neutrino mass, which is partially degenerate with parameters of extended models of gravity. We study and explore this degeneracy in Horndeski generalized scalar-tensor theories of gravity. Using forecasted cosmic microwave background and galaxy pow ...
Leto: 2017 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Št. zadetkov: 6
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