898 citations · 2.3k across the 28 of their papers we have counts for
27 papers · 1 filter
Late-Time Emergence of Dark Energy and Its Interaction with Dark Matter
Sibo Zhang, Weiqiang Yang, Supriya Pan +3
We present an interacting scenario between dark energy (DE) and dark matter (DM), where DE has an emergent nature, that means, DE was absent in the early universe but it becomes ef…
Do low-redshift observations open the doors to an open universe?
Deng Wang, Olga Mena, Salvatore Capozziello +1
The detection of a significant deviation from a zero curvature would have profound consequences for inflationary theories and fundamental physics. Relative to high-redshift Planck'…
Dark energy and neutrinos along the cosmic expansion history
Pietro Ghedini, Rasmi Hajjar, Olga Mena
Recent cosmological measurements are hinting that dark energy may evolve, with its equation of state, , even showing oscillatory patterns. In this work, we employ a…
Dark Energy Is Not That Into You: Variable Couplings after DESI DR2 BAO
Weiqiang Yang, Sibo Zhang, Olga Mena +2
In interacting dark energy (DE) and dark matter (DM) scenarios, the interaction function typically includes a coupling parameter that quantifies the strength of energy exchange…
Neutrino mass tension or suppressed growth rate of matter perturbations?
William Giarè, Olga Mena, Enrico Specogna +1
Assuming a minimal CDM cosmology with three massive neutrinos, the joint analysis of Planck cosmic microwave background data, DESI baryon acoustic oscillations, and distance mod…
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…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
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…
Origin of cosmological neutrino mass bounds: background perturbations
Toni Bertólez-Martínez, Ivan Esteban, Rasmi Hajjar +2
The cosmological upper bound on the total neutrino mass is the dominant limit on this fundamental parameter. Recent observations-soon to be improved-have strongly tightened it, app…
Redshift Space Distortions corner interacting Dark Energy
Pietro Ghedini, Rasmi Hajjar, Olga Mena
Despite the fact that the CDM model has been highly successful over the last few decades in providing an accurate fit to a broad range of cosmological and astrophysical observat…
Neutrino cosmology after DESI: tightest mass upper limits, preference for the normal ordering, and tension with terrestrial observations
Jun-Qian Jiang, William Giarè, Stefano Gariazzo +6
The recent DESI Baryon Acoustic Oscillation measurements have led to tight upper limits on the neutrino mass sum, potentially in tension with oscillation constraints requiring $\su…
Updating neutrino mass constraints with Background measurements
Deng Wang, Olga Mena, Eleonora Di Valentino +1
Low-redshift probes, such as Baryon Acoustic Oscillations (BAO) and Supernovae Ia luminosity distances, have been shown to be crucial for improving the bounds on the total neutrino…
Neutrinos in Cosmology
Eleonora Di Valentino, Stefano Gariazzo, Olga Mena
Neutrinos are the least known particle in the Standard Model of elementary particle physics. They play a crucial role in cosmology, governing the universe's evolution and shaping t…
How robust are the parameter constraints extending the CDM model?
Stefano Gariazzo, William Giarè, Olga Mena +1
We present model-marginalized limits on the six standard CDM cosmological parameters (, , , , and ), as well a…
A Semiblind Reconstruction of the History of Effective Number of Neutrinos Using CMB Data
Sarah Safi, Marzieh Farhang, Olga Mena +1
We explore the possibility of redshift-dependent deviations in the contribution of relativistic degrees of freedom to the radiation budget of the cosmos, conventionally parameteriz…
Lighting Dark Ages with Tomographic ISW Effect
Deng Wang, Olga Mena
The integrated Sachs-Wolfe effect (ISW) describes how CMB photons pick up a net blue or redshift when traversing the time-varying gravitational potentials between the last scatteri…
A double take on early and interacting dark energy from JWST
Matteo Forconi, William Giarè, Olga Mena +4
The very first light captured by the James Webb Space Telescope (JWST) revealed a population of galaxies at very high redshifts more massive than expected in the canonical CDM m…
On a robust analysis of the growth of structure
Deng Wang, Olga Mena
Current cosmological tensions show that it is crucial to test the predictions from the canonical CDM paradigm at different cosmic times. One very appealing test of structure for…
Cosmological Bound on the QCD Axion Mass, Redux
Francesco D'Eramo, Eleonora Di Valentino, William Giarè +5
We revisit the joint constraints in the mixed hot dark matter scenario in which both thermally produced QCD axions and relic neutrinos are present. Upon recomputing the cosmologica…
Cosmology Intertwined II: The Hubble Constant Tension
Eleonora Di Valentino, Luis A. Anchordoqui, Ozgur Akarsu +90
The current cosmological probes have provided a fantastic confirmation of the standard Cold Dark Matter cosmological model, that has been constrained with unprecedented accurac…
Axion cold dark matter: status after Planck and BICEP2
E. Di Valentino, E. Giusarma, M. Lattanzi +2
We investigate the axion dark matter scenario (ADM), in which axions account for all of the dark matter in the Universe, in light of the most recent cosmological data. In particula…
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Measuring D_A and H at z=0.57 from the Baryon Acoustic Peak in the Data Release 9 Spectroscopic Galaxy Sample
Lauren Anderson, Eric Aubourg, Stephen Bailey +35
We present measurements of the angular diameter distance to and Hubble parameter at z=0.57 from the measurement of the baryon acoustic peak in the correlation of galaxies from the…
The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 9 Spectroscopic Galaxy Sample
Lauren Anderson, Eric Aubourg, Stephen Bailey +73
We present measurements of galaxy clustering from the Baryon Oscillation Spectroscopic Survey (BOSS), which is part of the Sloan Digital Sky Survey III (SDSS-III). These use the Da…
Harrison-Z'eldovich primordial spectrum is consistent with observations
S. Pandolfi, A. Cooray, E. Giusarma +4
Inflation predicts primordial scalar perturbations with a nearly scale-invariant spectrum and a spectral index approximately unity (the Harrison--Zel'dovich (HZ) spectrum). The fir…