Publication details for Prof Peter HattonMackenzie, Ruari, Fumagalli, Michele, Theuns, Tom, Hatton, David J, Garel, Thibault, Cantalupo, Sebastiano, Christensen, Lise, Fynbo, Johan P U, Kanekar, Nissim, Møller, Palle, O’Meara, John, Prochaska, J Xavier, Rafelski, Marc, Shanks, Tom & Trayford, James (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.
- Publication type: Journal Article
- ISSN/ISBN: 0035-8711 (print), 1365-2966 (electronic)
- DOI: 10.1093/mnras/stz1501
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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.