DESI-DR1 <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"> <a:mn>3</a:mn> <a:mo>×</a:mo> <a:mn>2</a:mn> </a:math> -pt analysis: consistent cosmology across weak lensing surveys
We present a joint cosmological analysis of projected galaxy clustering observations from the Dark Energy Spectroscopic Instrument Data Release 1 (DESI-DR1), and overlapping weak gravitational lensing observations from three datasets: the Kilo-Degree Survey (KiDS-1000), the Dark Energy Survey (DES-Y3), and the Hyper-Suprime-Cam Survey (HSC-Y3). This combination of large-scale structure probes allows us to measure a set of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mn>3</mml:mn> <mml:mo>×</mml:mo> <mml:mn>2</mml:mn> </mml:mrow> </mml:math> -pt correlation functions, breaking the degeneracies between parameters in cosmological fits to individual observables. We obtain mutually-consistent constraints on the parameter from the combination of DESI-DR1 and DES-Y3, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msub> <mml:mi>S</mml:mi> <mml:mn>8</mml:mn> </mml:msub> <mml:mo>=</mml:mo> <mml:msubsup> <mml:mn>0.760</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.018</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.020</mml:mn> </mml:mrow> </mml:msubsup> </mml:mrow> </mml:math> from KiDS-1000, and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msub> <mml:mi>S</mml:mi> <mml:mn>8</mml:mn> </mml:msub> <mml:mo>=</mml:mo> <mml:msubsup> <mml:mn>0.771</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.027</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.026</mml:mn> </mml:mrow> </mml:msubsup> </mml:mrow> </mml:math> from HSC-Y3. These parameter determinations are consistent with fits to the Planck Cosmic Microwave Background dataset, albeit with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mn>1.5</mml:mn> <mml:mo>−</mml:mo> <mml:mn>2</mml:mn> <mml:mi>σ</mml:mi> </mml:mrow> </mml:math> lower values in the plane. We perform our analysis with a unified pipeline tailored to the requirements of each cosmic shear survey, which self-consistently determines cosmological and astrophysical parameters. We generate an analytical covariance matrix for the correlation data including all cross-covariances between probes, and we design a new blinding procedure to safeguard our analysis against confirmation bias, whilst leaving goodness-of-fit statistics unchanged. Our study is part of a suite of papers that present joint cosmological analyses of DESI-DR1 and weak gravitational lensing datasets.
Authors
- A. Souki
- A. Bera
- A. Elliott
- R. Ruggeri
- B. Hadzhiyska
- A. Semenaite
- G. Gutierrez
- N. Palanque-Delabrouille
- K. Honscheid
- A. Font-Ribera
- G. Niz
- J. E. Forero-Romero
- Biprateep Dey
- A. Meisner
- E. Sanchez
- D. Kirkby
- W. J. Percival
- G. Rossi
- C. Poppett
- M. E. Levi
- DESI Colllaboration
- A. de la Macorra
- R. Joyce
- J. Coloma Nadal
- H. Zou
- M. Vargas-Magaña
- S. Joudaki
- C. Saulder
- B. A. Weaver
- C. Blake
- T. Claybaugh
- J. S. Lange
- E. Gaztanaga
- D. Bianchi
- S. Nadathur
- J. A. Newman
- N. Emas
- S. Ahlen
- R. Miquel
- R. Zhou
- H. K. Herrera-Alcantar
- C. Howlett
- D. Huterer
- S. Gontcho A Gontcho
- M. Ishak
- S. Ferraro
- I. Pérez-Ràfols
- L. Le Guillou
- C. Zhou
- A. Krolewski
- C. Garcia-Quintero
- J. Aguilar
- J. Silber
- D. Schlegel
- O. Lahav
- A. Kremin
- M. Schubnell
- M. Landriau
- A. Leauthaud
- M. Manera
- H. Seo
- C. Lamman
- D. Brooks
- D. Sprayberry
- A. Cuceu
- J. Guy
- Porredon A
- P. Doel
- F. J. Castander
- K. S. Dawson
- S. Heydenreich
- A. Robertson
- F. Prada
- G. Tarlé
Publication Details
- Journal
- The Open Journal of Astrophysics
- Published
- 2026-04-28
- DOI
- https://doi.org/10.33232/001c.161342
- Primary Topic
- Galaxies: Formation, Evolution, Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00