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ODIN: Clustering Analysis of 14,000 Ly{\alpha} Emitting Galaxies at z=2.4, 3.1, and 4.5

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arxiv 2503.17824 v2 pith:XG5YB23M submitted 2025-03-22 astro-ph.GA

classification astro-ph.GA
keywords laesclusteringgalaxiesrespectivelyalphaanalysisdarkhalos
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Lyman Alpha 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 deg$^2$ COSMOS field from the One-hundred-deg$^2$ DECam Imaging in Narrowbands (ODIN) 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 $b$ = $1.72^{+0.26}_{-0.27}, 2.01^{+0.26}_{-0.29},$ and $2.95^{+0.40}_{-0.46}$, for $z$ = 2.4, 3.1, and 4.5, respectively. The median dark matter halo masses inferred from these measurements are $\log(M_{h}/M_{\odot})$ = $11.44^{+0.30}_{-0.28}, 11.13^{+0.26}_{-0.26}$, and $10.85^{+0.24}_{-0.24}$ 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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The 3D clustering of Lyman Alpha Emitters measured with DESI

    astro-ph.CO 2026-06 unverdicted novelty 6.0 of 10

    DESI LAE clustering measurements give a linear bias of 2.31-2.62 with constraints on radiative transfer effects and halo occupation from correlation functions and power spectra.

  2. Identifying a protocluster formation at z $\sim$ 4.5 in the COSMOS field: an extension of Taralay protocluster, traced by Ly-alpha emitters surrounding a submm galaxy

    astro-ph.GA 2025-07 conditional novelty 5.0 of 10

    Narrow-band imaging finds four overdense regions of Ly-alpha emitters at z=4.5 near submm galaxy J1000+0234, likely an infalling extension of the Taralay protocluster.

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