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dc.contributor.authorKaviraj, S.
dc.contributor.authorHuertas-Company, M.
dc.contributor.authorCohen, S.
dc.contributor.authorPeirani, S.
dc.contributor.authorWindhorst, R. A.
dc.contributor.authorO'Connell, R. W.
dc.contributor.authorSilk, J.
dc.contributor.authorDopita, M. A.
dc.contributor.authorHathi, N. P.
dc.contributor.authorKoekemoer, A. M.
dc.contributor.authorMei, S.
dc.contributor.authorRutkowski, M.
dc.contributor.authorRyan, R. E.
dc.contributor.authorShankar, F.
dc.date.accessioned2017-07-20T16:05:56Z
dc.date.available2017-07-20T16:05:56Z
dc.date.issued2014-09-11
dc.identifier.citationKaviraj , S , Huertas-Company , M , Cohen , S , Peirani , S , Windhorst , R A , O'Connell , R W , Silk , J , Dopita , M A , Hathi , N P , Koekemoer , A M , Mei , S , Rutkowski , M , Ryan , R E & Shankar , F 2014 , ' The role of major mergers in the size growth of intermediate-mass spheroids ' , Monthly Notices of the Royal Astronomical Society , vol. 443 , no. 2 , pp. 1861-1866 . https://doi.org/10.1093/mnras/stu1220
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 10573046
dc.identifier.otherPURE UUID: 0f7ccc66-b3ed-4cea-a477-db3d67e01f34
dc.identifier.otherArXiv: http://arxiv.org/abs/1407.8185v1
dc.identifier.otherScopus: 84905650007
dc.identifier.urihttp://hdl.handle.net/2299/19025
dc.descriptionThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
dc.description.abstractWe study of the role of ‘major’ mergers (mass ratios >1: 4) in driving size growth in high-redshift (1 < z < 2) spheroidal galaxies (SGs) with stellar masses between 109.5 and 1010.7 M⊙. This is a largely unexplored mass range at this epoch, containing the progenitors of more massive SGs on which the bulk of the size-evolution literature is based. We visually split our SGs into systems that are relaxed and those that exhibit tidal features indicative of a recent merger. Numerical simulations indicate that, given the depth of our images, only tidal features due to major mergers will be detectable at these epochs (features from minor mergers being too faint), making the disturbed SGs a useful route to estimating major-merger-driven size growth. The disturbed SGs are offset in size from their relaxed counterparts, lying close to the upper envelope of the local size–mass relation. The mean size ratio of the disturbed SGs to their relaxed counterparts is ∼2. Combining this observed size growth with empirical major-merger histories from the literature suggests that the size evolution of a significant fraction (around two-thirds) of SGs in this mass range could be driven by major mergers. If, as is likely, our galaxies are progenitors of more massive (M* > 1010.7 M⊙) SGs at z < 1, then major mergers are also likely to play an important role in the size growth of at least some massive SGs in this mass range.en
dc.format.extent7
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.subjectastro-ph.GA
dc.titleThe role of major mergers in the size growth of intermediate-mass spheroidsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2014-06-18
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stu1220
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeopenAccess


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