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dc.contributor.authorDavis, Timothy A.
dc.contributor.authorYoung, Lisa M.
dc.contributor.authorCrocker, Alison F.
dc.contributor.authorBureau, Martin
dc.contributor.authorBlitz, Leo
dc.contributor.authorAlatalo, Katherine
dc.contributor.authorEmsellem, Eric
dc.contributor.authorNaab, Thorsten
dc.contributor.authorBayet, Estelle
dc.contributor.authorBois, Maxime
dc.contributor.authorBournaud, Frederic
dc.contributor.authorCappellari, Michele
dc.contributor.authorDavies, Roger L.
dc.contributor.authorde Zeeuw, P. T.
dc.contributor.authorDuc, Pierre-Alain
dc.contributor.authorKhochfar, Sadegh
dc.contributor.authorKrajnovic, Davor
dc.contributor.authorKuntschner, Harald
dc.contributor.authorMcDermid, Richard M.
dc.contributor.authorMorganti, Raffaella
dc.contributor.authorOosterloo, Tom
dc.contributor.authorSarzi, Marc
dc.contributor.authorScott, Nicholas
dc.contributor.authorSerra, Paolo
dc.contributor.authorWeijmans, Anne-Marie
dc.identifier.citationDavis , T A , Young , L M , Crocker , A F , Bureau , M , Blitz , L , Alatalo , K , Emsellem , E , Naab , T , Bayet , E , Bois , M , Bournaud , F , Cappellari , M , Davies , R L , de Zeeuw , P T , Duc , P-A , Khochfar , S , Krajnovic , D , Kuntschner , H , McDermid , R M , Morganti , R , Oosterloo , T , Sarzi , M , Scott , N , Serra , P & Weijmans , A-M 2014 , ' The ATLAS 3D Project - XXVIII. Dynamically-driven star formation suppression in early-type galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 444 , no. 4 , pp. 3427-3445 .
dc.identifier.otherPURE: 144052719
dc.identifier.otherPURE UUID: dae9f0e0-47d6-4f52-b8d1-5a2dd38fa88c
dc.identifier.otherBibCode: 2014arXiv1403.4850D
dc.identifier.otherORCID: /0000-0002-5908-6852/work/40233454
dc.identifier.otherWOS: 000343400100029
dc.identifier.otherScopus: 84922493077
dc.description.abstractWe present measurements of the star formation rate (SFR) in theearly-type galaxies (ETGs) of the ATLAS3D sample, based on Wide-field Infrared Survey Explorer (WISE) 22um and Galaxy Evolution Explorer (GALEX) far-ultraviolet emission. We combine these with gas masses estimated from 12CO and HI data in order to investigate the star formation efficiency (SFE) in a larger sample of ETGs than previously available. We first recalibrate (based on WISE data) the relation between old stellar populations (traced at Ks-band) and 22um luminosity, allowing us to remove the contribution of 22um emission from circumstellar dust. We then go on to investigate the position of ETGs on the Kennicutt-Schmidt (KS) relation. Molecular gas-rich ETGs have comparable star formation surface densities to normal spiral galaxy centres, but they lie systematically offset from the KS relation, having lower star formation efficiencies by a factor of ~2.5 (in agreement with other authors). This effect is driven by galaxies where a substantial fraction of the molecular material is in the rising part of the rotation curve, and shear is high. We show here for the first time that although the number of stars formed per unit gas mass per unit time is lower in ETGs, it seems that the amount of stars formed per free-fall time is approximately constant. The scatter around this dynamical relation still correlates with galaxy properties such as the shape of the potential in the inner regions. This leads us to suggest that dynamical properties (such as shear or the global stability of the gas) may be important second parameters that regulate star formation and cause much of the scatter around star-formation relations.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rights© 2014. The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. This article has been accepted for publication in Monthly Notices of the Royal Astronomical Societyen
dc.subjectStars: mass-lossen
dc.subjectISM: moleculesen
dc.subjectGalaxies: elliptical and lenticular, cDen
dc.subjectGalaxies: ISMen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleThe ATLAS3D Project - XXVIII. Dynamically-driven star formation suppression in early-type galaxiesen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.description.statusPeer revieweden

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