The 3D clustering of Lyman Alpha Emitters measured with DESI
Haruki Ebina, Martin J. White, Rongpu Zhou, Arjun Dey, David Schlegel, Jessica Nicole Aguilar, Steven Ahlen, Davide Bianchi, David Brooks, Francisco Javier Castander, Todd Claybaugh, Kyle S. Dawson, Axel de la Macorra, Peter Doel, Simone Ferraro, Andreu Font-Ribera, Jaime E. Forero-Romero, Satya Gontcho A Gontcho, Alma Xochitl Gonzalez-Morales, Gaston Gutierrez, Julien Guy, ChangHoon Hahn, Hiram K. Herrera-Alcantar, Mustapha Ishak, David Kirkby, Anthony Kremin, Ofer Lahav, Martin Landriau, Dustin Lang, Laurent Le Guillou, Michael E. Levi, Marc Manera, Paul Martini, Aaron Meisner, Ramon Miquel, Seshadri Nadathur, Nathalie Palanque-Delabrouille, Will J. Percival, Francisco Prada, Ignasi Pérez-Ràfols, Ashley J. Ross, Graziano Rossi, Eusebio Sanchez, Michael Schubnell, Hee-Jong Seo, Gregory Tarlé, Benjamin Alan Weaver
astro-ph.CO
Submitted: 2026-06-23
Comments: 32+13 pages, 17 figures
Code: https://github.com/legacysurvey/legacypipehttps:
License: http://creativecommons.org/licenses/by/4.0/
The gist: We present a clustering analysis of Lyman- alpha emitters (LAEs) using spectroscopic observations from the Dark Energy Spectroscopic Instrument (DESI) of candidates selected from the Blanco/DECam
Terminology
Abstract
We present a clustering analysis of Lyman- alpha emitters (LAEs) using spectroscopic observations from the Dark Energy Spectroscopic Instrument (DESI) of candidates selected from the Blanco/DECam Intermediate-Band Imaging Survey (IBIS). We measure the two-point correlation function and the power spectrum, including cross-correlations with DESI quasars. Using both analytical and halo occupation distribution (HOD) simulation-based modeling, we find a linear bias of b about 2.31 -- 2.62 for LAEs over the redshift range 2.26 < z < 3.41. The analytical modeling also provides constraints on the strength of radiative transfer effects, while the HOD analysis characterizes the LAE-halo connection across multiple models. Finally, we quantify the magnitude of non-perturbative clustering effects such as Fingers of God in the LAE population, providing essential input for the accurate modeling of LAE-based cosmological analyses in forthcoming high-redshift surveys such as DESI-II.
Sources
- Data Release 1 of the Dark Energy Spectroscopic Instrument
- DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
- Snowmass2021 Cosmic Frontier White Paper: Cosmology and Fundamental Physics from the three-dimensional Large Scale Structure
- A Spectroscopic Road Map for Cosmic Frontier: DESI, DESI-II, Stage-5
- The Spectroscopic Stage-5 Experiment
- The Evolution of the Intergalactic Medium
- DESI DR2 Results I: Baryon Acoustic Oscillations from the Lyman Alpha Forest
- Bias, redshift space distortions and primordial nongaussianity of nonlinear transformations: application to Lyman alpha forest
- Towards physics responsible for large-scale Lyman-$\alpha$ forest bias parameters
- The Ly$\alpha$ forest flux correlation function: a perturbation theory perspective
- Don't miss the forest for the trees: the Lyman alpha forest power spectrum in effective field theory
- Physical Properties of Galaxies from z=2-4
- Modeling CMB Lensing Cross Correlations with {\sc CLEFT}
- Cosmology with dropout selection: Straw-man surveys and CMB lensing
- Cosmology at high redshift -- a probe of fundamental physics
- The Simons Observatory: Instrument Overview
- Cosmology before noon with multiple galaxy populations
- Observations of the Lyman-$\alpha$ Universe
- Clustering analysis of medium-band selected high-redshift galaxies
- The Dark Energy Camera
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