6 papers
Temperature effects on white dwarfs in modified gravity
Sofía Vidal, Aneta Wojnar, Laur Järv
In this article we analyze the effects of a finite temperature equation of state on the equilibrium structure of white dwarfs in massive Brans-Dicke theory as well as the symmetron…
Inflation with Nieh-Yan-like terms in metric-affine gravity
Ilaria Andrei, Christian Dioguardi, Damianos Iosifidis +3
We study single-field slow-roll inflation in metric-affine gravity with a scalar field non-minimally coupled to the non-Riemannian Ricci scalar and to the divergences of the torsio…
Friedmann cosmology with fluids and hyperfluids
Ilaria Andrei, Damianos Iosifidis, Laur Järv +1
We discuss flat Friedmann-Lemaitre-Robertson-Walker (FLRW) metric-affine cosmology where the metric and connection as well as the matter energy-momentum and hypermomentum all obey…
Global Portraits of Inflation in Nonsingular Variables
Laur Järv, Dmitri Kraiko
In the phase space perspective, scalar field slow roll inflation is described by a heteroclinic orbit from a saddle type fixed point to a final attractive point. In many models the…
Friedmann cosmology with hyperfluids
Ilaria Andrei, Damianos Iosifidis, Laur Järv +1
In metric-affine gravity, both the gravitational and matter actions depend not just on the metric, but also on the independent affine connection. Thus matter can be modeled as a hy…
Exploring the stability of cosmology near general relativity limit with different connections
MarÃa-José Guzmán, Laur Järv, Laxmipriya Pati
In this work, we study cosmological spacetime configurations in gravity with nonvanishing symmetric teleparallel connections. It is known that the spatially flat, homogeneou…