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Št. zadetkov: 3
ǂA ǂgeneral theory of linear cosmological perturbations
M. Lagos, Emilio Bellini, J. Noller, Pedro G. Ferreira, Tessa Baker
Izvirni znanstveni članek
Oznake: modified gravity;cosmological perturbations;Boltzmann codes;
We analyse cosmological perturbations around a homogeneous and isotropic background for scalar-tensor, vector-tensor and bimetric theories of gravity. Building on previous results, we propose a unified view of the effective parameters of all these theories. Based on this structure, we explore the vi ...
Leto: 2018 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Strong constraints on cosmological gravity from GW170817 and GRB 170817A
Tessa Baker, Emilio Bellini, Pedro G. Ferreira, M. Lagos, J. Noller, Ignacy Sawicki
Izvirni znanstveni članek
Oznake: modified gravity;dark energy;cosmology;cosmological constraints;CMB;large-scale structure;gravitational waves;
The detection of an electromagnetic counterpart (GRB 170817A) to the gravitational-wave signal (GW170817) from the merger of two neutron stars opens a completely new arena for testing theories of gravity. We show that this measurement allows us to place stringent constraints on general scalar-tensor ...
Leto: 2017 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Theoretical priors in scalar-tensor cosmologies
Dina Traykova, Emilio Bellini, Pedro G. Ferreira, Carlos García-García, J. Noller, Miguel Zumalacarregui
Izvirni znanstveni članek
Oznake: modified gravity;dark energy;cosmology;cosmological constraints;neutrinos;CMB;
Attempts at constraining theories of late time accelerated expansion often assume broad priors for the parameters in their phenomenological description. Focusing on shift-symmetric scalar-tensor theories with standard gravitational wave speed, we show how a more careful analysis of their dynamical e ...
Leto: 2021 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Št. zadetkov: 3
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