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arXiv · 2512.15962

Cosmological Constraints from Full-Scale Clustering and Galaxy-Galaxy Lensing with DESI DR1

Johannes U. Lange·Alexandra Wells·Andrew Hearin·Gillian Beltz-Mohrmann·Alexie Leauthaud·Sven Heydenreich·Chris Blake·Jessica Nicole Aguilar·Steven Ahlen·Abhijeet Anand·Davide Bianchi·David Brooks·Francisco Javier Castander·Todd Claybaugh·Shaun Cole·Andrei Cuceu·Kyle Dawson·Axel de la Macorra·Biprateep Dey·Peter Doel·Ann Elliott·Ni Putu Audita Placida Emas·Simone Ferraro·Andreu Font-Ribera·Jaime E. Forero-Romero·Cristhian Garcia-Quintero·Enrique Gaztañaga·Satya Gontcho A Gontcho·Gaston Gutierrez·Julien Guy·Klaus Honscheid·Dragan Huterer·Mustapha Ishak·Shahab Joudaki·Dick Joyce·Robert Kehoe·David Kirkby·Theodore Kisner·Anthony Kremin·Alex Krolewski·Ofer Lahav·Claire Lamman·Martin Landriau·Laurent Le Guillou·Michael Levi·Marc Manera·Paul Martini·Aaron Meisner·Ramon Miquel·John Moustakas·Eva-Maria Mueller·Seshadri Nadathur·Jeffrey A. Newman·Gustavo Niz·Nathalie Palanque-Delabrouille·Will Percival·Claire Poppett·Anna Porredon·Francisco Prada·Ignasi Pérez-Ràfols·Amy Robertson·Graziano Rossi·Rossana Ruggeri·Eusebio Sanchez·Christoph Saulder·David Schlegel·Michael Schubnell·Agne Semenaite·Hee-Jong Seo·Joseph Harry Silber·David Sprayberry·Zechang Sun·Gregory Tarlé·Mariana Vargas Magana·Benjamin Alan Weaver·Risa Wechsler·Pauline Zarrouk·Rongpu Zhou·Hu Zou
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Abstract

We present constraints on cosmic structure growth from the analysis of galaxy clustering and galaxy--galaxy lensing with galaxies from the Dark Energy Spectroscopic Instrument (DESI) Data Release 1. Our analysis includes four samples drawn from the Bright Galaxy Survey (BGS) and the Luminous Red Galaxy (LRG) target classes. Projected galaxy clustering measurements from DESI are supplemented with lensing data from the Dark Energy Survey (DES), the Kilo-Degree Survey (KiDS), and the Hyper Suprime-Cam (HSC) survey around the same targets. Our method relies on a simulation-based modeling framework using the AbacusSummit simulations and a complex halo occupation distribution model that incorporates assembly bias. We analyze scales down to $0.4 \, h^{-1} \, \mathrm{Mpc}$ for clustering and $2.5 \, h^{-1} \, \mathrm{Mpc}$ for lensing, leading to stringent constraints on $S_8 = σ_8 \sqrt{Ω_\mathrm{m} / 0.3}$ and $Ω_\mathrm{m}$ when fixing other cosmological parameters to those preferred by the CMB. We find $S_8 = 0.797_{-0.024}^{+0.023}$ and $Ω_\mathrm{m} = 0.292 \pm 0.011$ when using lensing measurements from DES and KiDS. Similarly, for HSC, we find $S_8 = 0.791_{-0.021}^{+0.020}$ and $Ω_\mathrm{m} = 0.300 \pm 0.009$ when assuming the best-fit photometric redshift offset suggested by the HSC collaboration. Overall, our results are in good agreement with other results in the literature while continuing to highlight the constraining power of non-linear scales.

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Johannes U. Lange, Alexandra Wells, Andrew Hearin, Gillian Beltz-Mohrmann, Alexie Leauthaud, Sven Heydenreich, Chris Blake, Jessica Nicole Aguilar, Steven Ahlen, Abhijeet Anand, Davide Bianchi, David Brooks, Francisco Javier Castander, Todd Claybaugh, Shaun Cole, Andrei Cuceu, Kyle Dawson, Axel de la Macorra, Biprateep Dey, Peter Doel, Ann Elliott, Ni Putu Audita Placida Emas, Simone Ferraro, Andreu Font-Ribera, Jaime E. Forero-Romero, Cristhian Garcia-Quintero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Julien Guy, Klaus Honscheid, Dragan Huterer, Mustapha Ishak, Shahab Joudaki, Dick Joyce, Robert Kehoe, David Kirkby, Theodore Kisner, Anthony Kremin, Alex Krolewski, Ofer Lahav, Claire Lamman, Martin Landriau, Laurent Le Guillou, Michael Levi, Marc Manera, Paul Martini, Aaron Meisner, Ramon Miquel, John Moustakas, Eva-Maria Mueller, Seshadri Nadathur, Jeffrey A. Newman, Gustavo Niz, Nathalie Palanque-Delabrouille, Will Percival, Claire Poppett, Anna Porredon, Francisco Prada, Ignasi Pérez-Ràfols, Amy Robertson, Graziano Rossi, Rossana Ruggeri, Eusebio Sanchez, Christoph Saulder, David Schlegel, Michael Schubnell, Agne Semenaite, Hee-Jong Seo, Joseph Harry Silber, David Sprayberry, Zechang Sun, Gregory Tarlé, Mariana Vargas Magana, Benjamin Alan Weaver, Risa Wechsler, Pauline Zarrouk, Rongpu Zhou, Hu Zou. 2026-09-19. Cosmological Constraints from Full-Scale Clustering and Galaxy-Galaxy Lensing with DESI DR1. https://arxiv.org/abs/2512.15962

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