[Abbreviated] We investigate the dependence of Lyman-α emitter (LAE) clustering on Lyman-α luminosity. We use 1030 LAEs from the MUSE-Wide survey, 679 LAEs from MUSE-Deep, and 367 LAEs from the to-date deepest ever spectroscopic survey, the MUSE Extremely Deep Field. All objects have spectroscopic redshifts of 3<z<6 and cover a large dynamic range of Lyα luminosities: 40.15<log(LLyα/[ergs−1])<43.35. We apply the Adelberger et al. K-estimator as the clustering statistic and fit the measurements with state-of-the-art halo occupation distribution (HOD) models. From the three main data sets, we find that the large-scale bias factor, the minimum mass to host one central LAE, Mmin, and (on average) one satellite LAE, M1, increase weakly with an increasing line luminosity. The satellite fractions are ≲10% (≲20%) at 1σ (3σ) confidence level, supporting a scenario in which DMHs typically host one single LAE. We next bisected the three main samples into disjoint subsets to thoroughly explore the dependence of the clustering properties on LLyα. We report a strong (8σ) clustering dependence on LLyα, where the highest luminosity LAE subsample (log(LLyα/[ergs−1])≈42.53) clusters more strongly (bhigh=3.13−0.15+0.08) and resides in more massive DMHs (log(Mh/[h−1M⊙])=11.43−0.10+0.04) than the lowest luminosity one (log(LLyα/[ergs−1])≈40.97), which presents a bias of blow=1.79−0.06+0.08 and occupies log(Mh/[h−1M⊙])=10.00−0.09+0.12 halos. We discuss the implications of these results for evolving Lyα luminosity functions, halo mass dependent Lyα escape fractions, and incomplete reionization signatures.
@article{arxiv.2301.04133,
title = {Clustering dependence on Lyman-$\alpha$ luminosity from MUSE surveys at $3<z<6$},
author = {Y. Herrero Alonso and T. Miyaji and L. Wisotzki and M. Krumpe and J. Matthee and J. Schaye and H. Aceves and H. Kusakabe and T. Urrutia},
journal= {arXiv preprint arXiv:2301.04133},
year = {2023}
}
Comments
Accepted for publication in A&A. 17 pages, 14 figures, 4 tables