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dc.contributor.authorSmit, R
dc.contributor.authorSwinbank, AM
dc.contributor.authorMassey, R
dc.contributor.authorRichard, J
dc.contributor.authorSmail, I
dc.contributor.authorKneib, J-P
dc.date.accessioned2017-07-18T15:19:11Z
dc.date.available2017-07-18T15:19:11Z
dc.date.issued2017-03-07
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/265649
dc.description.abstractWe 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.
dc.language.isoen
dc.publisherOxford University Press
dc.subjectgalaxies: evolution
dc.subjectgalaxies: formation
dc.subjectgalaxies: high-redshift
dc.titleA gravitationally boosted MUSE survey for emission-line galaxies at z greater than or similar to 5 behind the massive cluster RCS 0224
dc.typeArticle
prism.endingPage3323
prism.issueIdentifier3
prism.publicationDate2017
prism.publicationNameMonthly Notices of the Royal Astronomical Society
prism.startingPage3306
prism.volume467
dc.identifier.doi10.17863/CAM.9837
dcterms.dateAccepted2017-01-26
rioxxterms.versionofrecord10.1093/mnras/stx245
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2017-03-07
dc.contributor.orcidSmit, Renske [0000-0001-8034-7802]
dc.identifier.eissn1365-2966
dc.publisher.urlhttp://dx.doi.org/10.1093/mnras/stx245
rioxxterms.typeJournal Article/Review
cam.issuedOnline2017-01-28


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