2025ApJ...988L..57H

Lyα emitters (LAEs) are star-forming galaxies that efficiently probe the spatial distribution of galaxies in the high-redshift Universe. The spatial clustering of LAEs reflects the properties of their individual host dark matter halos, allowing us to study the evolution of the galaxy-halo connection. We analyze the clustering of 5233, 5220, and 3706 LAEs at z = 2.4, 3.1, and 4.5, respectively, in the 9 deg² COSMOS field from the One-hundred-deg² DECam Imaging in Narrowbands survey. After correcting for redshift-space distortions, LAE contamination rates, and the integral constraint, the observed angular correlation functions imply linear galaxy bias factors of b = $1.7{2}_{-0.27}^{+0.26},2.0{1}_{-0.29}^{+0.26},$ and $2.9{5}_{-0.46}^{+0.40}$ for z = 2.4, 3.1, and 4.5, respectively. The median dark matter halo masses inferred from these measurements are ${\mathrm{log}}({M}_{h}/{M}_{\odot })$ = $11.4{4}_{-0.28}^{+0.30},\,11.1{3}_{-0.26}^{+0.26},\,\mathrm{and}\,10.8{5}_{-0.24}^{+0.24}$ for the three samples, respectively. The analysis also reveals that LAEs occupy roughly 3%-7% of the halos whose clustering strength matches that of the LAEs.