470 citations · 1.1k across the 31 of their papers we have counts for
31 papers · 1 filter
Deus ex -- Is evidence for dynamical dark energy conditioned on early cosmology?
Nils Schöneberg, Rodrigo Calderón, Julien Lesgourgues
Some free-form reconstructions of the dark energy equation of state suggest that dynamical dark energy is the only explanation for the observed data. In this letter we argue that e…
The world cup. II. A comprehensive competition between proposed Hubble tension solutions
Nils Schöneberg, Vivian Poulin, Angelo G. Ferrari +6
Cosmology stands at a crossroads. The Hubble tension has reached a nominal significance above , while analyses combining DESI BAO and Type Ia supernova data show emerging hints…
The World Cup. I. Summary of the baseline group stage results
Nils Schöneberg, Vivian Poulin, Angelo G. Ferrari +6
The Hubble tension has reached a nominal significance above , while new high-precision measurements of the cosmic microwave background (CMB) and baryon acoustic oscillations (B…
The BAO scale -- how standard is the standard ruler?
Francisco Asensio-Rivera, Nils Schöneberg, Héctor Gil-Marín +1
Analyses of baryon acoustic oscillations (BAO) commonly employ template-based methods to extract compressed parameters from the clustering of dark-matter tracers, which are then in…
Cosmological analysis of the DESI DR1 Lyman alpha 1D power spectrum
J. Chaves-Montero, A. Font-Ribera, P. McDonald +63
We present the cosmological analysis of the one-dimensional Lyman- flux power spectrum from the first data release of the Dark Energy Spectroscopic Instrument (DESI). We capture…
Cosmological neutrino mass: a frequentist overview in light of DESI
D. Chebat, C. Yèche, E. Armengaud +51
We derive constraints on the neutrino mass using a variety of recent cosmological datasets, including DESI BAO, the full-shape analysis of the DESI matter power spectrum and the on…
Predictions for new physics in the CMB damping tail
Tristan L. Smith, Nils Schöneberg
Ever since the Planck satellite measured the the cosmic microwave background (CMB) down to arcminute angular scales, the mismatch between the CMB-inferred value of the Hubble const…
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.…
The mass effect -- Variations of the electron mass and their impact on cosmology
Nils Schöneberg, Léo Vacher
We summarize and explain the current status of time variations of the electron mass in cosmology, showing that such variations allow for significant easing of the Hubble tension, f…
Euclid preparation. Sensitivity to neutrino parameters
Euclid Collaboration, M. Archidiacono, J. Lesgourgues +246
The Euclid mission of the European Space Agency will deliver weak gravitational lensing and galaxy clustering surveys that can be used to constrain the standard cosmological model…
Cosmological probes of Dark Radiation from Neutrino Mixing
Itamar J. Allali, Daniel Aloni, Nils Schöneberg
Models of stepped dark radiation have recently been found to have an important impact on the anisotropies of the cosmic microwave background, aiding in easing the Hubble tension. I…
Incompatibility of fine-structure constant variations at recombination with local observations
Léo Vacher, Nils Schöneberg
Some attempts of easing the critical Hubble tension present in modern cosmology have resorted to using variations of fundamental constants, such as the fine-structure constant, at…
The 2024 BBN baryon abundance update
Nils Schöneberg
We revisit the state of the light element abundances from big bang nucleosynthesis in early 2024 with particular focus on the derived baryon abundance. We find that the largest dif…
A tale of many
Licia Verde, Nils Schöneberg, Héctor Gil-Marín
The Hubble parameter , is not a univocally-defined quantity: it relates redshifts to distances in the near Universe, but is also a key parameter of the CDM standard cosmolo…
News from the Swampland -- Constraining string theory with astrophysics and cosmology
Nils Schöneberg, Léo Vacher, J. D. F. Dias +2
Our current best guess for a unified theory of gravitation and quantum field theory (string theory) generically predicts a set of requirements for a consistently quantized theory,…
Exploration of the Pre-recombination Universe with a High-Dimensional Model of an Additional Dark Fluid
Michael Meiers, Lloyd Knox, Nils Schöneberg
We implement and explore high-dimensional generalized dark matter (HDGDM) with an arbitrary equation of state as a function of redshift as an extension to ΛCDM.. Exposing this mode…
The weak, the strong and the ugly -- A comparative analysis of interacting stepped dark radiation
Nils Schöneberg, Guillermo Franco Abellán, Théo Simon +3
Models which address both the Hubble and tensions with the same mechanism generically cause a pre-recombination suppression of the small scale matter power spectrum. Here we…
Euclid: Validation of the MontePython forecasting tools
S. Casas, J. Lesgourgues, N. Schöneberg +124
The Euclid mission of the European Space Agency will perform a survey of weak lensing cosmic shear and galaxy clustering in order to constrain cosmological models and fundamental p…
Runaway dilaton models: improved constraints from the full cosmological evolution
Léo Vacher, Nils Schöneberg, J. D. F. Dias +2
One of the few firm predictions of string theory is the existence of a massless scalar field coupled to gravity, the dilaton. In its presence, the value of the fundamental constant…
Fast and robust Bayesian Inference using Gaussian Processes with GPry
Jonas El Gammal, Nils Schöneberg, Jesús Torrado +1
We present the GPry algorithm for fast Bayesian inference of general (non-Gaussian) posteriors with a moderate number of parameters. GPry does not need any pre-training, special ha…
What it takes to solve the Hubble tension through modifications of cosmological recombination
Nanoom Lee, Yacine Ali-Haïmoud, Nils Schöneberg +1
We construct data-driven solutions to the Hubble tension which are perturbative modifications to the fiducial CDM cosmology, using the Fisher bias formalism. Taking as proof of…
CosmicNet II: Emulating extended cosmologies with efficient and accurate neural networks
Sven Günther, Julien Lesgourgues, Georgios Samaras +4
In modern analysis pipelines, Einstein-Boltzmann Solvers (EBSs) are an invaluable tool for obtaining CMB and matter power spectra. To accelerate the computation of these observable…
Constraints on extended Bekenstein models from cosmological, astrophysical, and local data
Léo Vacher, João F. Dias, Nils Schöneberg +5
Searching for variations of nature's fundamental constants is a crucial step in our quest to go beyond our current standard model of fundamental physics. If they exist, such variat…
One likelihood to bind them all: Lyman- constraints on non-standard dark matter
Deanna C. Hooper, Nils Schöneberg, Riccardo Murgia +3
Recent cosmological tensions have rekindled the search for models beyond CDM that cause a suppression of the matter power spectrum. Due to the small scales accessible to Lyman-$…