44 citations · 150 across the 10 of their papers we have counts for
7 papers · 1 filter
Black Hole Shadow Drift and Photon Ring Frequency Drift
Emmanuel Frion, Leonardo Giani, Tays Miranda
The apparent angular size of the shadow of a black hole in an expanding Universe is redshift-dependent. Since cosmological redshifts change with time - known as the redshift drift…
Stochastic collapse
Tays Miranda, Emmanuel Frion, David Wands
We investigate cosmological models described by a scalar field with an exponential potential, and apply the stochastic formalism, which allows us to study how quantum field fluctua…
Neutron star masses in -gravity
Fulvio Sbisà, Pedro O. Baqui, Tays Miranda +2
We address the issue of the existence of inequivalent definitions of gravitational mass in -gravity. We present several definitions of gravitational mass, and discuss the fo…
Cosmology and Newtonian limit in a model of gravity with nonlocally interacting metrics
Leonardo Giani, Tays Miranda, Oliver F. Piattella
We investigate the features of the cosmological expansion history described by a recent model of gravity characterised by two nonlocally interacting metrics. We perform a detailed…
Generic slow-roll and non-gaussianity parameters in theories
Tays Miranda, Celia Escamilla-Rivera, Oliver F. Piattella +1
In this paper we establish \textit{formulae} for the inflationary slow-roll parameters , and as functions of the Ricci scalar for theories of gravity. As exam…
Reconstructing a theory from the -Attractors
T. Miranda, J. C. Fabris, O. F. Piattella
We show an analogy at high curvature between a theory and the -Attractors. We calculate the expressions of the parameters , and as func…
An exponential correction to Starobinsky's inflationary model
Júlio C. Fabris, Tays Miranda, Oliver F. Piattella
We analyse theories of gravity from a dynamical system perspective, showing how the correction in Starobinsky's model plays a crucial role from the viewpoint of the in…