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dc.contributor.authorGinolfi, Men
dc.contributor.authorJones, Garethen
dc.contributor.authorBethermin, Men
dc.contributor.authorFudamoto, Yen
dc.contributor.authorLoiacono, Fen
dc.contributor.authorFujimoto, Sen
dc.contributor.authorFevre, O Leen
dc.contributor.authorFaisst, Aen
dc.contributor.authorSchaerer, Den
dc.contributor.authorCassata, Pen
dc.contributor.authorSilverman, JDen
dc.contributor.authorYan, Linen
dc.contributor.authorCapak, Pen
dc.contributor.authorBardelli, Sen
dc.contributor.authorBoquien, Men
dc.contributor.authorCarraro, Ren
dc.contributor.authorDessauges-Zavadsky, Men
dc.contributor.authorGiavalisco, Men
dc.contributor.authorGruppioni, Cen
dc.contributor.authorIbar, Een
dc.contributor.authorKhusanova, Yen
dc.contributor.authorLemaux, BCen
dc.contributor.authorMaiolino, Robertoen
dc.contributor.authorNarayanan, Den
dc.contributor.authorOesch, Pen
dc.contributor.authorPozzi, Fen
dc.contributor.authorRodighiero, Gen
dc.contributor.authorTalia, Men
dc.contributor.authorToft, Sen
dc.contributor.authorVallini, Len
dc.contributor.authorVergani, Den
dc.contributor.authorZamorani, Gen
dc.date.accessioned2019-12-13T00:30:39Z
dc.date.available2019-12-13T00:30:39Z
dc.identifier.issn0004-6361
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/299845
dc.description.abstractWe study the efficiency of galactic feedback in the early Universe by stacking the [C II] 158 um emission in a large sample of normal star-forming galaxies at 4 < z < 6 from the ALMA Large Program to INvestigate [C II] at Early times (ALPINE) survey. Searching for typical signatures of outflows in the high-velocity tails of the stacked [C II] profile, we observe (i) deviations from a single-component Gaussian model in the combined residuals and (ii) broad emission in the stacked [C II] spectrum, with velocities of |v|<~ 500 km/s. The significance of these features increases when stacking the subset of galaxies with star formation rates (SFRs) higher than the median (SFRmed = 25 Msun/yr), thus confirming their star-formation-driven nature. The estimated mass outflow rates are comparable to the SFRs, yielding mass-loading factors of the order of unity (similarly to local star-forming galaxies), suggesting that star-formation-driven feedback may play a lesser role in quenching galaxies at z > 4. From the stacking analysis of the datacubes, we find that the combined [C II] core emission (|v|< 200 km/s) of the higher-SFR galaxies is extended on physical sizes of ~ 30 kpc (diameter scale), well beyond the analogous [C II] core emission of lower-SFR galaxies and the stacked far-infrared continuum. The detection of such extended metal-enriched gas, likely tracing circumgalactic gas enriched by past outflows, corroborates previous similar studies, confirming that baryon cycle and gas exchanges with the circumgalactic medium are at work in normal star-forming galaxies already at early epochs.
dc.publisherEDP Sciences
dc.rightsAll rights reserved
dc.rights.uri
dc.subjectastro-ph.GAen
dc.subjectastro-ph.GAen
dc.titleThe ALPINE-ALMA [CII] survey: Star-formation-driven outflows and circumgalactic enrichment in the early Universeen
dc.typeArticle
prism.publicationNameAstronomy and Astrophysics: a European journalen
dc.identifier.doi10.17863/CAM.46918
dcterms.dateAccepted2019-11-15en
rioxxterms.versionofrecord10.1051/0004-6361/201936872en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2019-11-15en
dc.contributor.orcidJones, Gareth [0000-0002-0267-9024]
dc.contributor.orcidMaiolino, Roberto [0000-0002-4985-3819]
dc.identifier.eissn1432-0746
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idECH2020 EUROPEAN RESEARCH COUNCIL (ERC) (695671)
pubs.funder-project-idSTFC (ST/M001172/1)
cam.issuedOnline2019-11-25en
dc.identifier.urlhttps://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/201936872en
rioxxterms.freetoread.startdate2020-11-22


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