Explanipedia

A joint analysis of 3D clustering and galaxy × CMB-lensing cross-correlations with DESI DR1 galaxies Open

Michael Maus, Martin White, Noah Sailer, Antón Baleato Lizancos, S Ferraro , et al. · 2025

The spectroscopic data from DESI Data Release 1 (DR1) galaxies enables the analysis of 3D clustering by fitting galaxy power spectra and reconstructed correlation functions in redshift space. Given low measurements of the amplitude of stru…

A Unified Photometric Redshift Calibration for Weak Lensing Surveys using the Dark Energy Spectroscopic Instrument Open

J.U Lange, Diana Blanco, Alexie Leauthaud, A. H. Wright, A. T. Fisher , et al. · 2025

The effective redshift distribution $n(z)$ of galaxies is a critical component in the study of weak gravitational lensing. Here, we introduce a new method for determining $n(z)$ for weak lensing surveys based on high-quality redshifts and …

$H_0$ Without the Sound Horizon (or Supernovae): A 2% Measurement in DESI DR1 Open

E. A. Zaborowski, P. C. Taylor, Klaus Honscheid, Andrei Cuceu, Arnaud de Mattia , et al. · 2025

The sound horizon scale $r_s$ is a key source of information for early-time $H_0$ measurements, and is therefore a common target of new physics proposed to solve the Hubble tension. We present a sub-2% measurement of the Hubble constant th…

Detection of supernova magnitude fluctuations induced by large-scale structure Open

Angie Nguyen, Chris Blake, R Turner, V Aronica, Julian Bautista , et al. · 2025

The peculiar velocities of supernovae and their host galaxies are correlated with the large-scale structure of the Universe, and can be used to constrain the growth rate of structure and test the cosmological model. In this work, we measur…

Author Correction: Dynamical dark energy in light of the DESI DR2 baryonic acoustic oscillations measurements Open

Gangxu Gu, Xiaoma Wang, Yuting Wang, Gong‐Bo Zhao, Levon Pogosian , et al. · 2025

Testing gravitational physics by combining DESI DR1 and weak lensing datasets using the E_G estimator Open

S.J Rauhut, Christine E. Blake, U. Andrade, H. E. Noriega, José Aguilar , et al. · 2025

The action of gravitational physics across space-time creates observable signatures in the behaviour of light and matter. We perform combined-probe studies using data from the Baryon Oscillation Spectroscopic Survey (BOSS) and Dark Energy …

Dynamical dark energy in light of the DESI DR2 baryonic acoustic oscillations measurements Open

Gangxu Gu, Xiaoma Wang, Yuting Wang, Gong‐Bo Zhao, Levon Pogosian , et al. · 2025

These are data files and python scripts to produce figures in the main text of "Dynamical Dark Energy in light of the DESI DR2 Baryonic Acoustic Oscillations Measurements" by Gu et al [DESI collaboration] (arXiv: 2504.06118).

Fiducial-Cosmology-dependent systematics for the DESI 2024 Full-Shape Analysis Open

Rafaela Gsponer, S. Ramírez-Solano, Frank Rodriguez-Martinez, M. Vargas-Magaña, Sergi Novell-Masot , et al. · 2025

We assess the impact of the fiducial cosmology choice on cosmological inference from full-shape (FS) fits of the galaxy power spectrum in the DESI 2024 Data Release 1 (DR1). Using a suite of AbacusSummit DR1 mock catalogues based on the Pl…

Exploring HOD-dependent systematics for the DESI 2024 Full-Shape galaxy clustering analysis Open

N. Findlay, S. Nadathur, W.J Percival, Arnaud de Mattia, Pauline Zarrouk , et al. · 2025

We analyse the robustness of the DESI 2024 cosmological inference from the full shape of the galaxy power spectrum to uncertainties in the Halo Occupation Distribution (HOD) model of the galaxy-halo connection and the choice of priors on n…

Modified gravity constraints from the full shape modeling of clustering measurements from DESI 2024 Open

Mustapha Ishak, Jian Pan, R. Calderón, K. Lodha, Georgios Valogiannis , et al. · 2025

We present cosmological constraints on deviations from general relativity (GR) from the first-year of clustering observations from the Dark Energy Spectroscopic Instrument (DESI) in combination with other available datasets including the C…

Frequentist Cosmological Constraints from Full-Shape Clustering Measurements in DESI DR1 Open

James Morawetz, Hong Zhang, Marco Bonici, Will J. Percival, Andrea Crespi , et al. · 2025

We perform a frequentist analysis using the standard profile likelihood method for clustering measurements from Data Release 1 of the Dark Energy Spectroscopic Instrument (DESI). While Bayesian inferences for Effective Field Theory models …

Inference of matter power spectrum at z=0 using DESI DR1 Full-Shape data Open

R. Cereskaite, Eva-Maria Mueller, Cullan Howlett, T. M. Davis, José Aguilar , et al. · 2025

Measurements of galaxy distributions at large cosmic distances capture clustering from the past. In this study, we use a cosmological model to translate these observations into the present-day galaxy distribution. Specifically, we reconstr…

Cosmological neutrino mass: a frequentist overview in light of DESI Open

D. Chebat, Christophe Yéche, E. Armengaud, Nils Schöneberg, Michael Walther , et al. · 2025

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 one-dimensional power spectrum of the Lyman-$α$ forest (P1D) …

DESI DR2 reference mocks: clustering results from Uchuu-BGS and LRG Open

Elena Fernández‐García, Francisco Prada, A. G. Smith, Joseph DeRose, Ashley J. Ross , et al. · 2025

The aim of this work is to construct mock galaxy catalogues that accurately reproduce the redshift evolution of galaxy number density, clustering statistics, and baryonic properties, such as stellar mass for luminous red galaxies (LRGs) an…

Stellar reddening map from DESI imaging and spectroscopy Open

Rongpu Zhou, Julien Guy, S. E. Koposov, Edward F. Schlafly, David J. Schlegel , et al. · 2025

We present new Galactic reddening maps of the high Galactic latitude sky using DESI imaging and spectroscopy. We directly measure the reddening of 2.6 million stars by comparing the observed stellar colors in and from DESI imaging with t…

Stellar reddening map from DESI imaging and spectroscopy Open

Rongpu Zhou, Julien Guy, S. E. Koposov, Edward F. Schlafly, David J. Schlegel , et al. · 2025

We present new Galactic reddening maps of the high Galactic latitude sky using DESI imaging and spectroscopy. We directly measure the reddening of 2.6 million stars by comparing the observed stellar colors in and from DESI imagin…

Lensing Without Borders: Measurements of galaxy-galaxy lensing and projected galaxy clustering in DESI DR1 Open

Sven Heydenreich, Alexie Leauthaud, Chris Blake, Z. J. Sun, J.U Lange , et al. · 2025

We present Galaxy-Galaxy Lensing measurements obtained by cross-correlating spectroscopically observed galaxies from the first data release of the Dark Energy Spectroscopic Instrument (DESI) with source galaxies from the Hyper Suprime-Cam …

Cosmological implications of DESI DR2 BAO measurements in light of the latest ACT DR6 CMB data Open

NULL AUTHOR_ID, H. E. Noriega, A. de Mattia, Alejandro Avilés, K. Lodha , et al. · 2025

We report cosmological results from the Dark Energy Spectroscopic Instrument (DESI) measurements of baryon acoustic oscillations (BAO) when combined with recent data from the Atacama Cosmology Telescope (ACT). By jointly analyzing ACT and …

Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples Open

Sergi Novell-Masot, Héctor Gil-Marín, Licia Verde, J. Aguilar, S. P. Ahlen , et al. · 2025

We present the first joint analysis of the power spectrum and bispectrum using the Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI), focusing on Luminous Red Galaxies (LRGs) and quasars (QSOs) across a redshift range…

Constraints on primordial non-Gaussianity from the cross-correlation of DESI luminous red galaxies and <i>Planck</i> CMB lensing Open

J. R. Bermejo-Climent, R. Demina, Alex Krolewski, E. Chaussidon, Mehdi Rezaie , et al. · 2025

Aims. We use the angular cross-correlation between a luminous red galaxy (LRG) sample from the Dark Energy Spectroscopic Instrument (DESI) Legacy Survey data release DR9 and the Planck cosmic microwave background (CMB) lensing maps to cons…

Cosmological implications of DESI DR2 BAO measurements in light of the latest ACT DR6 CMB data Open

C. García-Quintero, H. E. Noriega, A. de Mattia, A. Avilés, K. Lodha , et al. · 2025

We report cosmological results from the Dark Energy Spectroscopic Instrument (DESI) measurements of baryon acoustic oscillations (BAO) when combined with recent data from the Atacama Cosmology Telescope (ACT). By jointly analyzing ACT and …

Backlighting extended gas halos around luminous red galaxies: kinematic Sunyaev-Zel'dovich effect from DESI Y1 x ACT Open

Bernardita Ried Guachalla, Emmanuel Schaan, Boryana Hadzhiyska, Simone Ferraro, J. Aguilar , et al. · 2025

The gas density profile around galaxies, shaped by feedback and affecting the galaxy lensing signal, is imprinted on the cosmic microwave background (CMB) by the kinematic Sunyaev-Zel'dovich effect (kSZ). We precisely measure this effect (…

Analytical and EZmock covariance validation for the DESI 2024 results Open

D. Forero-Sánchez, M. Rashkovetskyi, O. Alves, A. de Mattia, S. Nadathur , et al. · 2025

The estimation of uncertainties in cosmological parameters is an important challenge in Large-Scale-Structure (LSS) analyses. For standard analyses such as Baryon Acoustic Oscillations (BAO) and Full-Shape two approaches are usually consid…

Backlighting extended gas halos around luminous red galaxies: kinematic Sunyaev-Zel'dovich effect from DESI Y1 x ACT Open

Bernardita Ried Guachalla, Emmanuel Schaan, Boryana Hadzhiyska, Simone Ferraro, José Aguilar , et al. · 2025

The gas density profile around galaxies, shaped by feedback and affecting the galaxy lensing signal, is imprinted on the cosmic microwave background (CMB) by the kinematic Sunyaev-Zel'dovich effect (kSZ). We precisely measure this effect (…

Validation of the DESI DR2 Ly$\alpha$ BAO analysis using synthetic datasets Open

Lidia Casas, H. K. Herrera-Alcantar, J. Chaves-Montero, Andrei Cuceu, Andreu Font-Ribera , et al. · 2025

The second data release (DR2) of the Dark Energy Spectroscopic Instrument (DESI), containing data from the first three years of observations, doubles the number of Lyman-$\alpha$ (Ly$\alpha$) forest spectra in DR1 and it provides the large…

Constraining the phase shift of relativistic species in DESI BAOs Open

Abbé M Whitford, Cullan Howlett, M. Vargas-Magaña, S. Fromenteau, T. M. Davis , et al. · 2025

In the early Universe, neutrinos decouple quickly from the primordial plasma and propagate without further interactions. The impact of free-streaming neutrinos is to create a temporal shift in the gravitational potential that impacts the a…

Neural network-based model of galaxy power spectrum: fast full-shape galaxy power spectrum analysis Open

S. Trusov, Pauline Zarrouk, Shaun Cole · 2025

We present a neural network-based emulator for the galaxy redshift-space power spectrum that enables several orders of magnitude acceleration in the galaxy clustering parameter inference, while preserving 3$\sigma$ accuracy better than 0.5…

Mitigation of DESI fiber assignment incompleteness effect on two-point clustering with small angular scale truncated estimators Open

Michele Pinon, Arnaud de Mattia, Peter McDonald, E. Burtin, V. Ruhlmann-Kleider , et al. · 2025

We present a method to mitigate the effects of fiber assignment incompleteness in two-point power spectrum and correlation function measurements from galaxy spectroscopic surveys, by truncating small angular scales from estimators. We deri…

An analysis of parameter compression and Full-Modeling techniques with Velocileptors for DESI 2024 and beyond Open

M Maus, S. Chen, Martin White, José Aguilar, S. P. Ahlen , et al. · 2025

In anticipation of forthcoming data releases of current and future spectroscopic surveys, we present the validation tests and analysis of systematic effects within velocileptors modeling pipeline when fitting mock data from the AbacusSummi…

Comparing Compressed and Full-Modeling analyses with FOLPS: implications for DESI 2024 and beyond Open

H. E. Noriega, Alejandro Avilés, Héctor Gil-Marín, S. Ramirez-Solano, S. Fromenteau , et al. · 2025

The Dark Energy Spectroscopic Instrument (DESI) will provide unprecedented information about the large-scale structure of our Universe. In this work, we study the robustness of the theoretical modelling of the power spectrum of Folps , a n…

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