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dc.contributor.authorMaltby, David T.
dc.contributor.authorAlmaini, Omar
dc.contributor.authorMcLure, Ross J.
dc.contributor.authorWild, Vivienne
dc.contributor.authorDunlop, James
dc.contributor.authorRowlands, Kate
dc.contributor.authorHartley, William G.
dc.contributor.authorHatch, Nina A.
dc.contributor.authorSocolovsky, Miguel
dc.contributor.authorWilkinson, Aaron
dc.contributor.authorAmorin, Ricardo
dc.contributor.authorBradshaw, Emma J.
dc.contributor.authorCarnall, Adam C.
dc.contributor.authorCastellano, Marco
dc.contributor.authorCimatti, Andrea
dc.contributor.authorCresci, Giovanni
dc.contributor.authorCullen, Fergus
dc.contributor.authorDe Barros, Stephane
dc.contributor.authorFontanot, Fabio
dc.contributor.authorGarilli, Bianca
dc.contributor.authorKoekemoer, Anton M.
dc.contributor.authorMcLeod, Derek J.
dc.contributor.authorPentericci, Laura
dc.contributor.authorTalia, Margherita
dc.identifier.citationMaltby , D T , Almaini , O , McLure , R J , Wild , V , Dunlop , J , Rowlands , K , Hartley , W G , Hatch , N A , Socolovsky , M , Wilkinson , A , Amorin , R , Bradshaw , E J , Carnall , A C , Castellano , M , Cimatti , A , Cresci , G , Cullen , F , De Barros , S , Fontanot , F , Garilli , B , Koekemoer , A M , McLeod , D J , Pentericci , L & Talia , M 2019 , ' High-velocity outflows in massive post-starburst galaxies at z > 1 ' , Monthly Notices of the Royal Astronomical Society, Advance Access , vol. 489 , no. 1 , pp. 1139–1151 .
dc.identifier.otherPURE: 261094604
dc.identifier.otherPURE UUID: e7609dc3-cd1d-4b0b-b559-676fa5fc0232
dc.identifier.otherBibCode: 2019MNRAS.tmp.2188M
dc.identifier.otherScopus: 85075256524
dc.identifier.otherWOS: 000489292800089
dc.description.abstractWe investigate the prevalence of galactic-scale outflows in post-starburst (PSB) galaxies at high redshift (1 < z < 1.4), using the deep optical spectra available in the UKIDSS Ultra Deep Survey (UDS). We use a sample of ∼40 spectroscopically confirmed PSBs, recently identified in the UDS field, and perform a stacking analysis in order to analyse the structure of strong interstellar absorption features such as Mg ii (λ2800 Å). We find that for massive (⁠M∗>1010M⊙⁠) PSBs at z > 1, there is clear evidence for a strong blue-shifted component to the Mg ii absorption feature, indicative of high-velocity outflows (⁠vout∼1150±160kms−1⁠) in the interstellar medium. We conclude that such outflows are typical in massive PSBs at this epoch, and potentially represent the residual signature of a feedback process that quenched these galaxies. Using full spectral fitting, we also obtain a typical stellar velocity dispersion σ* for these PSBs of ∼200kms−1⁠, which confirms they are intrinsically massive in nature (dynamical mass Md∼1011M⊙⁠). Given that these high-z PSBs are also exceptionally compact (re ∼ 1–2kpc⁠) and spheroidal (Sérsic index n ∼ 3), we propose that the outflowing winds may have been launched during a recent compaction event (e.g. major merger or disc collapse) that triggered either a centralized starburst or active galactic nuclei (AGN) activity. Finally, we find no evidence for AGN signatures in the optical spectra of these PSBs, suggesting they were either quenched by stellar feedback from the starburst itself, or that if AGN feedback is responsible, the AGN episode that triggered quenching does not linger into the post-starburst phase.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society, Advance Accessen
dc.rightsCopyright © 2019 the Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectGalaxies: high-redshiften
dc.subjectGalaxies: ISMen
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleHigh-velocity outflows in massive post-starburst galaxies at z > 1en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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