346 citations · 2.2k across the 40 of their papers we have counts for
40 papers
Revisiting CPL with sign-switching density: To cross or not to cross the NECB
Mine Gökçen, Özgür Akarsu, Eleonora Di Valentino
Recent DESI DR2 BAO measurements, when combined with CMB and SNeIa data, exhibit a - preference for dynamical dark energy (DE) described by the CPL-parametrized equatio…
The Serendipitous Axiodilaton: A Self-Consistent Recombination-Era Solution to the Hubble Tension
Adam Smith, Maria Mylova, Carsten van de Bruck +2
Axio-dilaton cosmology provides a minimal benchmark model for both Dark Matter (DM) and Dark Energy (DE) that is well motivated by fundamental physics. The axion and dilaton arise…
Decay of quintessence into dark matter: mitigating the Hubble tension?
Giovanni Montani, Luis A. Escamilla, Nakia Carlevaro +1
We propose a revised cosmological scenario that extends the Cold Dark Matter (CDM) framework by incorporating metric gravity in the Jordan frame. In this model, the d…
Beyond Two Parameters: Revisiting Dark Energy with the Latest Cosmic Probes
Hanyu Cheng, Supriya Pan, Eleonora Di Valentino
Dark energy (DE) models with many free parameters are often considered excessive, as constraining all parameters poses a significant challenge. While such models offer greater flex…
III. Interacting Dark Energy: Summary of Models, Pathologies, and Constraints
Marcel van der Westhuizen, Amare Abebe, Eleonora Di Valentino
We present an overview of the main results from our two companion papers that are relevant for observational constraints on interacting dark energy (IDE) models. We provide analyti…
I. Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
Marcel van der Westhuizen, Amare Abebe, Eleonora Di Valentino
Interacting dark energy (IDE) models, in which dark matter (DM) and dark energy (DE) exchange energy through a non-gravitational interaction, have long been proposed as candidates…
II. Non-Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
Marcel van der Westhuizen, Amare Abebe, Eleonora Di Valentino
We investigate interacting dark energy (IDE) models with phenomenological, non-linear interaction kernels , specifically $Q_{1}=3Hδ\left(\frac{ρ_{\rm dm}ρ_{\rm de}}{ρ_{\rm dm}+ρ…
Cosmographic Footprints of Dynamical Dark Energy
Elisa Fazzari, William Giarè, Eleonora Di Valentino
We introduce a novel cosmographic framework to trace the late-time kinematics of the Universe without assuming any underlying dynamics. The method relies on generalized Padé-$(2,1)…
Shape of Dark Energy: Constraining Its Evolution with a General Parametrization
Dong Ha Lee, Weiqiang Yang, Eleonora Di Valentino +2
We consider a general dark energy (DE) model parametrized by its equation-of-state (EoS), featuring three free parameters: (the present-day value of the DE EoS), (quant…
Dark Energy Crosses the Line: Quantifying and Testing the Evidence for Phantom Crossing
Emre Özülker, Eleonora Di Valentino, William Giarè
Combinations of the most recent CMB, BAO, and SNeIa datasets, when analyzed using the CPL parametrization, , exclude CDM at in favor of a…
When Dark Matter Heats Up: A Model-Independent Search for Non-Cold Behavior
Mazaharul Abedin, Luis A. Escamilla, Supriya Pan +2
This article questions the common assumption of cold dark matter (DM) by exploring the possibility of a non-zero equation of state (EoS) without relying on any parametric approach.…
Pressure Parametrization of Dark Energy: First and Second-Order Constraints with Latest Cosmological Data
Hanyu Cheng, Eleonora Di Valentino, Luis A. Escamilla +2
We explore an extension of the CDM model in which the pressure of the dark energy (DE) fluid evolves with the expansion of the Universe, expressed as a function of the scale…
Probing the cold nature of dark matter
Weiqiang Yang, Supriya Pan, Eleonora Di Valentino +3
A pressureless dark matter component fits well with several cosmological observations. However, there are indications that cold dark matter may encounter challenges in explaining o…
One-parameter dynamical dark energy: Hints for oscillations
Daniel A. Kessler, Luis A. Escamilla, Supriya Pan +1
There is mounting evidence from multiple cosmological probes that dark energy may be dynamical, with an equation of state that evolves over cosmic time. While this evidence is typi…
A low-redshift preference for an interacting dark energy model
Yuejia Zhai, Marco de Cesare, Carsten van de Bruck +2
We explore an interacting dark sector model in trace-free Einstein gravity where dark energy has a constant equation of state, , and the energy-momentum transfer potential is…
New constraints on interacting dark energy from DESI DR2 BAO observations
Emanuelly Silva, Miguel A. Sabogal, Mateus Scherer +3
In its second data release (DR2), the Dark Energy Spectroscopic Instrument (DESI) publicly released measurements of Baryon Acoustic Oscillations (BAO) from over 13.1 million galaxi…
Scale and redshift dependent limits on cosmic neutrino properties
Deng Wang, Olga Mena, Eleonora Di Valentino +1
Cosmological neutrino mass and abundance measurements are reaching unprecedented precision. Testing their stability versus redshift and scale is a crucial issue, as it can serve as…
An overview of what current data can (and cannot yet) say about evolving dark energy
William Giarè, Tariq Mahassen, Eleonora Di Valentino +1
Recent measurements of Baryon Acoustic Oscillations (BAO) and distance moduli from Type Ia supernovae suggest a preference for Dynamical Dark Energy (DDE) scenarios characterized b…
A solution to the S8 tension through neutrino-dark matter interactions
Lei Zu, William Giarè, Chi Zhang +3
Neutrinos and dark matter (DM) are two of the least understood components of the Universe, yet both play crucial roles in cosmic evolution. Clues about their fundamental properties…
Alleviating cosmological tensions with a hybrid dark sector
Elsa M. Teixeira, Gaspard Poulot, Carsten van de Bruck +2
We investigate a cosmological model inspired by hybrid inflation, where two scalar fields representing dark energy (DE) and dark matter (DM) interact through a coupling that is pro…
Do we need wavelets in the late Universe?
Luis A. Escamilla, Emre Özülker, Özgür Akarsu +2
We parameterize the Hubble function by adding Hermitian wavelets to the Hubble radius of CDM. This allows us to build Hubble functions that oscillate around CDM at late times…
Inflationary Potential as seen from Different Angles: Model Compatibility from Multiple CMB Missions
William Giarè, Supriya Pan, Eleonora Di Valentino +3
The cosmic microwave background (CMB) temperature and polarization anisotropies, as observed by independent astronomical missions such as WMAP, Planck, and most recently the Atacam…
Touch of Neutrinos on the Vacuum Metamorphosis: is the Solution Back?
Eleonora Di Valentino, Supriya Pan, Weiqiang Yang +1
With the entrance of cosmology in its new era of high precision experiments, low- and high-redshift observations set off tensions in the measurements of both the present-day expans…
2021- Odyssey: Closed, Phantom and Interacting Dark Energy Cosmologies
Weiqiang Yang, Supriya Pan, Eleonora Di Valentino +2
Up-to-date cosmological data analyses have shown that \textit{(a)} a closed universe is preferred by the Planck data at more than CL, and \textit{(b)} interacting scenarios…