385 citations · 1.6k across the 43 of their papers we have counts for
43 papers
Cosmological perturbations in Energy-Momentum Squared Gravity
Peter K. S. Dunsby, Maria-Alexia Caldis, Eduardo Bittencourt
We present a fully covariant and gauge-invariant analysis of linear cosmological perturbations in Energy-Momentum Squared Gravity. Working within the 1+3 formalism, we derive the e…
Double polytropic cosmic acceleration from the Murnaghan equation of state
Peter K. S. Dunsby, Orlando Luongo, Marco Muccino +1
We consider a double polytropic cosmological fluid and demonstrate that, when one constituent resembles a bare cosmological constant while the other emulates a generalized Chaplygi…
Unifying the dark sector through a single matter fluid with non-zero pressure
Peter K. S. Dunsby, Orlando Luongo, Marco Muccino
We explore a generalised unified dark energy model that incorporates a non-minimal interaction between a tachyonic fluid and an additional scalar field. Specifically, we require th…
Horizon area bound and MOTS stability in locally rotationally symmetric solutions
Abbas M. Sherif, Peter K. S. Dunsby
In this paper, we study the stability of marginally outer trapped surfaces (MOTS), foliating horizons of the form , embedded in locally rotationally symmetric class II perf…
A comprehensive analysis of the compact phase space for Hu-Sawicki dark energy models including spatial curvature
Kelly MacDevette, Peter Dunsby, Saikat Chakraborty
We present a comprehensive dynamical systems analysis of homogeneous and isotropic Friedmann-Laîmatre-Robertson-Walker cosmologies in the Hu-Sawicki dark energy model for th…
Constraining disformal couplings with Redshift Space Distortion
Avishek Dusoye, Alvaro de la Cruz-Dombriz, Peter Dunsby +1
We study a quintessence model for which the scalar field is disformally coupled to dark matter. The background mimics the LCDM cosmological evolution and the quintessence potential…