DESI-DR1 3 × 2 -pt analysis: consistent cosmology across weak lensing surveys

作者：A. Porredon, Cullen H. Blake, J.U Lange, N Emas, José Edgar Madriz Aguilar, S. P. Ahlen, Apurba Bera, Davide Bianchi, D. Brooks, F. J. Castander, T. Claybaugh, J. Nadal, Andrei Cuceu, K. S. Dawson, Axel de la Macorra, Biprateep Dey, P. Doel, A. Elliott, S. Ferraro, Andreu Font-Ribera, J. E. Forero-Romero, C. García-Quintero, E. Gaztañaga, Satya Gontcho A Gontcho, G. Gutierrez, J. Guy, Boryana Hadzhiyska, H. K. Herrera-Alcantar, Sven Heydenreich, K. Honscheid, Cullan Howlett, D. Huterer, Mustapha Ishak, Shahab Joudaki, Robert Joyce, Diane Kirkby, A. Kremin, A. Krolewski, O. Lahav, C. Lamman, M. Landriau, L. Le Guillou, A. Leauthaud, M. E. Levi, Marc Manera, Aaron Meisner, R. Miquel, S. Nadathur, J. A. Newman, Gustavo Niz, N. Palanque‐Delabrouille, Will J. Percival, C. Poppett, Francisco Prada, Ignasi Pérez-Ràfols, Alex Robertson, Graziano Rossi, Rossana Ruggeri, E. Sanchez, C. Saulder, David J. Schlegel, M. Schubnell, Agne Semenaite, Hee‐Jong Seo, Jeffrey H. Silber, A. Souki, D. Sprayberry, G. Tarlé, M. Vargas-Magaña, Benjamin Alan Weaver, Conghao Zhou, Ruguang Zhou, Hu Zou, DESI Colllaboration · 发表于：The Open Journal of Astrophysics · 年份：2026 · DOI：10.33232/001c.161342 · 被引用次数：2 · 研究领域：Galaxies: Formation, Evolution, Phenomena、Cosmology and Gravitation Theories、Astronomy and Astrophysical Research

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 3 × 2 -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, S 8 = 0.760 − 0.018 + 0.020 from KiDS-1000, and S 8 = 0.771 − 0.027 + 0.026 from HSC-Y3. These parameter determinations are consistent with fits to the Planck Cosmic Microwave Background dataset, albeit with 1.5 − 2 σ 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...