Journal article
The prevalence of galaxy overdensities around UV-luminous Lyman α emitters in the Epoch of Reionization
E Leonova, PA Oesch, Y Qin, RP Naidu, JSB Wyithe, S De Barros, RJ Bouwens, RS Ellis, RM Endsley, A Hutter, GD Illingworth, J Kerutt, I Labbé, N Laporte, D Magee, SJ Mutch, GW Roberts-Borsani, R Smit, DP Stark, M Stefanon Show all
Monthly Notices of the Royal Astronomical Society | Published : 2022
Abstract
Before the end of the Epoch of Reionization, the Hydrogen in the Universe was predominantly neutral. This leads to a strong attenuation of Ly α lines of z ≳ 6 galaxies in the intergalactic medium. Nevertheless, Ly α has been detected up to very high redshifts (z ∼9) for several especially UV luminous galaxies. Here, we test to what extent the galaxy's local environment might impact the Ly α transmission of such sources. We present an analysis of dedicated Hubble Space Telescope (HST) imaging in the CANDELS/EGS field to search for fainter neighbours around three of the most UV luminous and most distant spectroscopically confirmed Ly α emitters: EGS-zs8-1, EGS-zs8-2, and EGSY-z8p7 at zspec = 7..
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Grants
Awarded by National Science Foundation
Funding Acknowledgements
We would like to thank the referee for their insightful comments that have helped clarify and improve this manuscript. We acknowledge support from the Swiss National Science Foundation through the SNSF Professorship grant 190079 (PAO, JK). The Cosmic Dawn Center (DAWN) is funded by the Danish National Research Foundation under grant No. 140. This research was supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. Part of this work was performed on the OzSTAR national facility at Swinburne University of Technology, which is funded by Swinburne University of Technology and the National Collaborative Research Infrastructure Strategy (NCRIS). ST is supported by the 2021 Research Fund 1.210134.01 of UNIST (Ulsan National Institute of Science & Technology). RSE acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 669253). RJB and MS acknowledge support from TOP grant TOP1.16.057. RS acknowledges support from a STFC Ernest Rutherford Fellowship (ST/S004831/1). AH acknowledges support from the European Research Council's starting grant ERC StG-717001 (DELPHI). AZ acknowledges support by Grant No. 2020750 from the United States-Israel Binational Science Foundation (BSF) and Grant No. 2109066 from the United States National Science Foundation (NSF), and by the Ministry of Science and Technology, Israel.