11 papers
Constraining gravity and evolving dark energy via large-scale structure and phase-space trajectories
Tshepo Mathibela, Alvaro de la Cruz-Dombriz, Savvas Nesseris
We present a joint observational analysis confronting viable modified gravity theories, specifically the Hu \& Sawicki and Starobinsky models, with background and large-scal…
A Tale of Two Couplings: Bayesian Selection in the Interacting Dark Sector
Miguel Barroso Varela, Álvaro de la Cruz-Dombriz
CDM provides a remarkably successful description of the Universe, yet it suffers from persistent discrepancies, with one of the most prominent being the tension between ea…
On relativistic observables in black bounce spacetimes
Víctor Ovejero-Bermúdez, Álvaro de la Cruz-Dombriz, Riccardo Della Monica
We investigate the phenomenology of black bounce spacetimes through a combined analytical and numerical study of relativistic observables associated with both time-like and null ge…
Cosmological structure growth in energy-momentum squared gravity
Alvaro de la Cruz-Dombriz, Peter K. S. Dunsby, Payel Sarkar
We investigate the cosmological evolution of matter perturbations in the modified gravity model , where denotes the quadratic contraction of the energy…
Implications of gravity on late-time cosmic structure growth through a complete description of density perturbations
Miguel Barroso Varela, Álvaro de la Cruz-Dombriz
We provide insight about the full form of the equations for matter density perturbations and the scalar Bardeen metric potentials in general theories of gravity. When consid…
Vector wormholes as conduits for matter interaction
Nailya Ganiyeva, Bruno J. Barros, Álvaro de la Cruz-Dombriz +1
In this work, we focus on the dynamics of a massive one-form field, \textbf{B}, often referred to simply as a vector field, that is minimally coupled to standard Einstein gravity.…