219 citations · 1.9k across the 32 of their papers we have counts for
32 papers
Safe Phantom Divide Crossing from Unscreened Non-Minimal Coupling to Gravity
Joel Argudo-Panes, Alex González-Fuentes, Adrià Gómez-Valent
Recent hints of dynamical dark energy, including a possible crossing of the phantom divide, have motivated the search for viable theoretical explanations. Scalar fields non-minimal…
XCDM: a running vacuum strategy for crossing the phantom divide
Joan Solà Peracaula, Adrià Gómez-Valent, Alex González-Fuentes
Composite dynamical dark energy (DDE) has recently been explored as an efficient way to help cure cosmological tensions through the so-called XCDM model (Gomez-Valent & Solà Per…
Revisiting model-independent constraints on spatial curvature and cosmic ladders calibration: updated and forecast analyses
Arianna Favale, Adrià Gómez-Valent, Marina Migliaccio
Model-independent approaches have gained increasing attention as powerful tools to investigate persistent tensions between cosmological observations and the predictions of CDM.…
Reconstruction of dark energy and late-time cosmic expansion using the Weighted Function Regression method
Alex González-Fuentes, Adrià Gómez-Valent
Recent data from multiple supernova catalogs and DESI, when combined with CMB, suggest a non-trivial evolution of dark energy (DE) at the CL. This evidence is typically qu…
Composite Dark Energy and the Cosmological Tensions
Adria Gómez-Valent, Joan Solà Peracaula
The standard cosmological model currently in force, aka CDM, has been plagued with a variety of tensions in the last decade or so, which puts it against the wall. At the core of…
Efficient Compression of Redshift-Space Distortion Data for Late-Time Modified Gravity Models
Yo Toda, Adrià Gómez-Valent, Kazuya Koyama
Current cosmological observations allow for deviations from the standard growth of large-scale structures in the universe. These deviations could indicate modifications to General…
Phantom matter: a challenging solution to the cosmological tensions
Adria Gomez-Valent, Joan Sola Peracaula
The idea of composite dark energy (DE) is quite natural since on general grounds we expect that the vacuum energy density (associated with the cosmological term ) may appear in…
Hints of Neutrino Dark Matter scattering in the CMB? Constraints from the Marginalized and Profile Distributions
William Giarè, Adrià Gómez-Valent, Eleonora Di Valentino +1
We study scatter-like interactions between neutrinos and dark matter in light of different combinations of temperature, polarization and lensing data released by three independent…
Late-time phenomenology required to solve the tension in view of the cosmic ladders and the anisotropic and angular BAO data sets
Adrià Gómez-Valent, Arianna Favale, Marina Migliaccio +1
The mismatch between the value of the Hubble parameter measured by SH0ES and the one inferred from the inverse distance ladder (IDL) constitutes the biggest tension affli…
Running vacuum in the Universe: phenomenological status in light of the latest observations, and its impact on the and tensions
Joan Sola Peracaula, Adria Gomez-Valent, Javier de Cruz Perez +1
A substantial body of phenomenological and theoretical work over the last few years strengthens the possibility that the vacuum energy density (VED) of the universe is dynamical, a…
Stringy Running Vacuum Model and current Tensions in Cosmology
Adrià Gómez-Valent, Nick E. Mavromatos, Joan Solà Peracaula
We discuss the potential alleviation of both the Hubble and the growth of galactic structure data tensions observed in the current epoch of Cosmology in the context of the so-calle…
BD-CDM and Running Vacuum Models: Theoretical background and current observational status
Javier de Cruz Perez, Joan Sola Peracaula, Adria Gomez-Valent +1
We present an analysis of the Brans-Dicke cosmological model with a cosmological constant and cold dark matter (BD-CDM). We find that the BD-CDM is favored by the overall cos…
Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories
Adrià Gómez-Valent, Prajwal Hassan Puttasiddappa
Recent studies by Solà Peracaula, Gómez-Valent, de Cruz Pérez and Moreno-Pulido (2019,2020) have pointed out the intriguing possibility that Brans-Dicke cosmology with constant vac…
Running vacuum against the and tensions
Joan Sola, Adria Gomez-Valent, Javier de Cruz Perez +1
The cosmological term, , was introduced years ago by Einstein in his gravitational field equations. Whether is a rigid quantity or a dynamical variable in cosmology ha…
Boosting MonteCarlo sampling with a non-Gaussian fit
Luca Amendola, Adrià Gómez-Valent
We propose a new method, called MonteCarlo Posterior Fit, to boost the MonteCarlo sampling of likelihood (posterior) functions. The idea is to approximate the posterior function by…
Brans-Dicke cosmology with a - term: a possible solution to CDM tensions
Joan Sola, Adria Gomez-Valent, Javier de Cruz Perez +1
We present a full-fledged analysis of Brans-Dicke cosmology with a cosmological constant and cold dark matter (BD-CDM for short). We extend the scenarios where the current cosmo…
Brans-Dicke gravity with a cosmological constant smoothes out CDM tensions
Joan Sola, Adria Gomez-Valent, Javier de Cruz Perez +1
We analyze Brans-Dicke gravity with a cosmological constant, , and cold dark matter (BD-CDM for short) in the light of the latest cosmological observations on distant superno…
Signs of Interacting Vacuum and Dark Matter in the Universe
Joan Sola, A. Gomez-Valent, J. de Cruz Perez
We consider the impact of dynamical dark energy (DDE) in the possible solution of the existing tensions in the CDM. We test both interacting and non-interacting DE models with d…
Signs of Dynamical Dark Energy in Current Observations
Joan Sola Peracaula, Adria Gomez-Valent, Javier de Cruz Perez
Investigations on dark energy (DE) are currently inconclusive about its time evolution. Hints of this possibility do however glow now and then in the horizon. Herein we assess the…
Quantifying the evidence for the current speed-up of the Universe with low and intermediate-redshift data. A more model-independent approach
Adrià Gómez-Valent
We reconstruct in this paper the deceleration and jerk parameters as functions of the cosmological redshift from data on cosmic chronometers (CCH), baryon acoustic oscillations (BA…
Relaxing the -tension through running vacuum in the Universe
Adria Gomez-Valent, Joan Sola
It has recently been shown that the class of running vacuum models (RVMs) has the capacity to fit the overall cosmological observations better than the concordance CDM model, th…
Vacuum dynamics in the Universe versus a rigid const
Joan Sola, Adria Gomez-Valent, Javier de Cruz Perez
In this year, in which we celebrate 100 years of the cosmological term, , in Einstein's gravitational field equations, we are still facing the crucial question whether is tr…
The tension in light of vacuum dynamics in the Universe
Joan Sola, Adria Gomez-Valent, Javier de Cruz Perez
Despite the outstanding achievements of modern cosmology, the classical dispute on the precise value of , which is the first ever parameter of modern cosmology and one of the…
Possible signals of vacuum dynamics in the Universe
Joan Sola Peracaula, Javier de Cruz Perez, Adria Gomez-Valent
We study a generic class of time-evolving vacuum models which can provide a better phenomenological account of the overall cosmological observations as compared to the CDM. Amon…