Ruari Mackenzie
Linking gas and galaxies at high redshift: MUSE surveys the environments of six damped Lyα systems at z ≈ 3
Mackenzie, Ruari; Fumagalli, Michele; Theuns, Tom; Hatton, David J; Garel, Thibault; Cantalupo, Sebastiano; Christensen, Lise; Fynbo, Johan PU; Kanekar, Nissim; Møller, Palle; O’Meara, John; Prochaska, J Xavier; Rafelski, Marc; Shanks, Tom; Trayford, James
Authors
Professor Michele Fumagalli michele.fumagalli@durham.ac.uk
Academic Visitor
Professor Tom Theuns tom.theuns@durham.ac.uk
Professor
Professor Peter Hatton p.d.hatton@durham.ac.uk
Emeritus Professor
Thibault Garel
Sebastiano Cantalupo
Lise Christensen
Johan PU Fynbo
Nissim Kanekar
Palle Møller
John O’Meara
J Xavier Prochaska
Marc Rafelski
Tom Shanks
James Trayford
Abstract
We present results from a survey of galaxies in the elds of six z 3 Damped Lyman systems (DLAs) using the Multi Unit Spectroscopic Explorer (MUSE) at the Very Large Telescope (VLT). We report a high detection rate of up to 80% of galaxies within 1000 km/s from DLAs and with impact parameters between 25 and 280 kpc. In particular, we discovered 5 high-condence Ly emitters associated with three DLAs, plus up to 9 additional detections across ve of the six elds. The majority of the detections are at relatively large impact parameters (> 50 kpc) with two detections being plausible host galaxies. Among our detections, we report four galaxies associated with the most metal-poor DLA in our sample (Z=Z = ????2:33 0:22), which trace an overdense structure resembling a lament. By comparing our detections with predictions from the Evolution and Assembly of GaLaxies and their Environments (EAGLE) cosmological simulations and a semi-analytic model designed to reproduce the observed bias of DLAs at z > 2, we conclude that our observations are consistent with a scenario in which a signicant fraction of DLAs trace the neutral regions within halos with a characteristic mass of Mh 1011 ???? 1012 M, in agreement with the inference made from the large-scale clustering of DLAs. We nally show how larger surveys targeting 25 absorbers have the potential of constraining the characteristic masses of halos hosting high-redshift DLAs with sucient accuracy to discriminate between dierent models.
Citation
Mackenzie, R., Fumagalli, M., Theuns, T., Hatton, D. J., Garel, T., Cantalupo, S., …Trayford, J. (2019). Linking gas and galaxies at high redshift: MUSE surveys the environments of six damped Lyα systems at z ≈ 3. Monthly Notices of the Royal Astronomical Society, 487(4), 5070-5096. https://doi.org/10.1093/mnras/stz1501
Journal Article Type | Article |
---|---|
Acceptance Date | May 9, 2019 |
Online Publication Date | Jun 4, 2019 |
Publication Date | Jul 31, 2019 |
Deposit Date | Jun 6, 2019 |
Publicly Available Date | Jun 6, 2019 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 487 |
Issue | 4 |
Pages | 5070-5096 |
DOI | https://doi.org/10.1093/mnras/stz1501 |
Public URL | https://durham-repository.worktribe.com/output/1299971 |
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Accepted Journal Article
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Copyright Statement
© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
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