742 citations · 3.1k across the 50 of their papers we have counts for
52 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.…
Constraining viscous fluid models in gravity with data
Shambel Sahlu, Renier T. Hough, Amare Abebe +1
We investigate the impact of bulk viscosity on the accelerating expansion and large-scale structure formation of a Universe in which the underlying gravitational interaction is des…
Structure growth in cosmology
Shambel Sahlu, Álvaro de la Cruz-Dombriz, Amare Abebe
We take into account redshift-space distortion measurements to investigate the growth of cosmological large-scale structures within the framework of modified symmetric teleparallel…
Smearing out contact terms in ghost-free infinite derivative quantum gravity
Ulrich K. Beckering Vinckers, Álvaro de la Cruz-Dombriz, Anupam Mazumdar
In the context of ghost-free infinite derivative gravity, we consider the single graviton exchange between two spinless particles, a spinless particle and a photon, or between a sp…
Wormholes with matter haunted by conformally coupled ghosts
Bruno J. Barros, Álvaro de la Cruz-Dombriz, Francisco S. N. Lobo
In this work, we present novel analytical solutions for static and spherically symmetric wormhole geometries threaded by an anisotropic distribution of matter conformally coupled t…
Numerical solutions for the -Klein-Gordon system
Ulrich K. Beckering Vinckers, Álvaro de la Cruz-Dombriz, Denis Pollney
We construct a numerical relativity code based on the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) formulation for the gravitational quadratic Starobinsky model. By removing th…
Junction conditions in bi-scalar Poincaré Gauge gravity
Adrián Casado-Turrión, Álvaro de la Cruz-Dombriz, Alejandro Jiménez-Cano +1
In this work, we study the junction conditions of the ghost-free subclass of quadratic Poincaré Gauge gravity, which propagates one scalar and one pseudo-scalar. For this purpose,…
Ghost-free infinite-derivative dilaton gravity in two dimensions
Ulrich K. Beckering Vinckers, Álvaro de la Cruz-Dombriz, Ivan Kolář +2
We present the ghost-free infinite-derivative extensions of the Spherically-Reduced Gravity (SRG) and Callan-Giddings-Harvey-Strominger (CGHS) theories in two space-time dimensions…
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…
Ghost-free higher-order theories of gravity with torsion
Álvaro de la Cruz-Dombriz, Francisco José Maldonado Torralba, Anupam Mazumdar
In this manuscript we will present the theoretical framework of the recently proposed infinite derivative theory of gravity with a non-symmetric connection. We will explicitly deri…
Black holes, gravitational waves and fundamental physics: a roadmap
Leor Barack, Vitor Cardoso, Samaya Nissanke +203
The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem-…
Cosmological bouncing solutions in extended teleparallel gravity theories
Alvaro de la Cruz-Dombriz, Gabriel Farrugia, Jackson Levi Said +1
In the context of extended Teleparallel gravity theories with a 3+1 dimensions Gauss-Bonnet analog term, we address the possibility of these theories reproducing several well-known…
Analysis of branon dark matter and extra-dimensional models with AMS-02
Jose A. R. Cembranos, Alvaro de la Cruz-Dombriz, Peter K. S. Dunsby +1
In the following work, we compute the positron production from branon dark matter annihilations in order to constrain extra-dimensional theories. By having assumed that the positro…
Cosmological reconstructed solutions in extended teleparallel gravity theories with a teleparallel Gauss-Bonnet term
Alvaro de la Cruz-Dombriz, Gabriel Farrugia, Jackson Levi Said +1
In the context of extended Teleparallel gravity theories with a 3+1 dimensions Gauss-Bonnet analog term, we address the possibility of these theories reproducing several well-known…
The realistic models of relativistic stars in f(R) = R + alpha R^2 gravity
Artyom V. Astashenok, Alvaro de la Cruz-Dombriz, Sergei D. Odintsov
In the context of f(R)=R + alpha R^2 gravity, we study the existence of neutron and quark stars with no intermediate approximations in the generalised system of Tolman-Oppenheimer-…
Model-independent limits and constraints on extended theories of gravity from cosmic reconstruction techniques
Álvaro de la Cruz-Dombriz, Peter K. S. Dunsby, Orlando Luongo +1
The onset of dark energy domination depends on the particular gravitational theory driving the cosmic evolution. Model independent techniques are crucial to test both the present $…
On neutron stars in f(R) theories: small radii, large masses and large energy emitted in a merger
Miguel Aparicio Resco, Alvaro de la Cruz-Dombriz, Felipe J. Llanes-Estrada +1
In the context of f(R) gravity theories, we show that the apparent mass of a neutron star as seen from an observer at infinity is numerically calculable but requires careful matchi…
Thermodynamic analysis of non-linear Reissner-Nordstrom black holes
Jose A. R. Cembranos, Alvaro de la Cruz-Dombriz, Javier Jarillo
In the present article we study the Inverse Electrodynamics Model. This model is a gauge and parity invariant non-linear Electrodynamics theory, which respects the conformal invari…
Theoretical and observational constraints of viable f(R) theories of gravity
Alvaro de la Cruz-Dombriz, Peter K. S. Dunsby, Sulona Kandhai +1
Modified gravity has attracted much attention over the last few years and remains a potential candidate for dark energy. In particular, the so-called viable f(R) gravity theories,…