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Št. zadetkov: 3
ǂThe ǂphenomenology of beyond Horndeski gravity
Dina Traykova, Emilio Bellini, Pedro G. Ferreira
Izvirni znanstveni članek
Oznake: modified gravity;cosmological perturbations;
We study the phenomenology of the beyond Horndeski class of scalar-tensor theories of gravity, which on cosmological scales can be characterised in terms of one extra function of time, βH, as well as the usual four Horndeski set of free functions. We show that βH can be directly related to the dampi ...
Leto: 2019 Vir: Repozitorij Univerze v Novi Gorici (RUNG)
Theoretical priors in scalar-tensor cosmologies
Carlos García-García, Emilio Bellini, Pedro G. Ferreira, Dina Traykova, Miguel Zumalacarregui
Izvirni znanstveni članek
Oznake: modified gravity;dark energy;cosmology;cosmological constraints;CMB;large-scale structure;
The late time acceleration of the Universe can be characterized in terms of an extra, time-dependent, component of the Universe—dark energy. The simplest proposal for dark energy is a scalar-tensor theory—quintessence—which consists of a scalar field, �, whose dynamics is solely dictated by its pote ...
Leto: 2020 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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