Renske Smit
A gravitationally boosted MUSE survey for emission-line galaxies at z ≳ 5 behind the massive cluster RCS 0224
Smit, Renske; Swinbank, A.M.; Massey, Richard; Richard, Johan; Smail, Ian; Kneib, J.-P.
Authors
Professor Mark Swinbank a.m.swinbank@durham.ac.uk
Professor
Professor Richard Massey r.j.massey@durham.ac.uk
Professor
Johan Richard
Professor Ian Smail ian.smail@durham.ac.uk
Emeritus Professor
J.-P. Kneib
Abstract
We present a Very Large Telescope/Multi Unit Spectroscopic Explorer (MUSE) survey of lensed high-redshift galaxies behind the z = 0.77 cluster RCS 0224−0002. We study the detailed internal properties of a highly magnified (μ ∼ 29) z = 4.88 galaxy seen through the cluster. We detect widespread nebular C iv λλ1548,1551 Å emission from this galaxy as well as a bright Lyα halo with a spatially uniform wind and absorption profile across 12 kpc in the image plane. Blueshifted high- and low-ionization interstellar absorption indicate the presence of a high-velocity outflow (Δv ∼ 300 km s− 1) from the galaxy. Unlike similar observations of galaxies at z ∼ 2 − 3, the Lyα emission from the halo emerges close to the systemic velocity – an order of magnitude lower in velocity offset than predicted in ‘shell’-like outflow models. To explain these observations, we favour a model of an outflow with a strong velocity gradient, which changes the effective column density seen by the Lyα photons. We also search for high-redshift Lyα emitters and identify 14 candidates between z = 4.8 − 6.6, including an overdensity at z = 4.88, of which only one has a detected counterpart in Hubble Space Telescope/Advanced Camera for Surveys+Wide Field Camera 3 imaging.
Citation
Smit, R., Swinbank, A., Massey, R., Richard, J., Smail, I., & Kneib, J. (2017). A gravitationally boosted MUSE survey for emission-line galaxies at z ≳ 5 behind the massive cluster RCS 0224. Monthly Notices of the Royal Astronomical Society, 476(3), 3306-3323. https://doi.org/10.1093/mnras/stx245
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 26, 2017 |
Online Publication Date | Mar 7, 2017 |
Publication Date | Jun 1, 2017 |
Deposit Date | Mar 9, 2017 |
Publicly Available Date | Mar 9, 2017 |
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 | 476 |
Issue | 3 |
Pages | 3306-3323 |
DOI | https://doi.org/10.1093/mnras/stx245 |
Public URL | https://durham-repository.worktribe.com/output/1361901 |
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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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