Orateur
Simão Marques Nunes
(Institute of Astrophysics and Space Sciences (Lisbon Portugal))
Description
In this talk I will present a minimal modified gravity model within the symmetric teleparallel formulation, based on an inverse non-metricity term that introduces no additional free parameters with respect to $\Lambda$CDM. I will discuss its main cosmological signatures as well as observational constraints obtained from CMB data alone and in combination with BAO, RSD, SNIa, and DES data, considering both fixed minimal neutrino mass and varying $\Sigma m_\nu$. Although the model can favor higher values of $H_0$ than $\Lambda$CDM, late-time observations place strong constraints on its viability as a minimal alternative to dark energy.
Auteurs
Luís Atayde
(Institute of Astrophysics and Space Sciences (Lisbon Portugal))
Simão Marques Nunes
(Institute of Astrophysics and Space Sciences (Lisbon Portugal))
Noemi Frusciante
(Dipartimento di Fisica "E. Pancini", Università degli Studi di Napoli "Federico II")