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dc.contributor.authorCarpineti, A.
dc.contributor.authorKaviraj, S.
dc.contributor.authorDarg, D.
dc.contributor.authorLintott, C.
dc.contributor.authorShabala, S.
dc.contributor.authorSchawinski, K.
dc.date.accessioned2013-10-30T10:30:56Z
dc.date.available2013-10-30T10:30:56Z
dc.date.issued2012-03-01
dc.identifier.citationCarpineti , A , Kaviraj , S , Darg , D , Lintott , C , Shabala , S & Schawinski , K 2012 , ' Spheroidal post-mergers in the local Universe ' , Monthly Notices of the Royal Astronomical Society , vol. 420 , no. 3 , pp. 2139-2146 . https://doi.org/10.1111/j.1365-2966.2011.20179.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 2065043
dc.identifier.otherPURE UUID: a266be1b-0e67-4224-ab36-7efccb5ca9b8
dc.identifier.otherScopus: 84857043400
dc.identifier.urihttp://hdl.handle.net/2299/11911
dc.description.abstractGalaxy merging is a fundamental aspect of the standard hierarchical galaxy formation paradigm. Recently, the Galaxy Zoo project has compiled a large, homogeneous catalogue of 3373 mergers, through direct visual inspection of the entire Sloan Digital Sky Survey spectroscopic sample. We explore a subset of galaxies from this catalogue that are spheroidal 'post-mergers' (SPMs) - where a single remnant is in the final stages of relaxation after the merger and shows evidence for a dominant bulge, making them plausible progenitors of early-type galaxies. Our results indicate that the SPMs have bluer colours than the general early-type galaxy population possibly due to merger-induced star formation. An analysis using optical emission-line ratios indicates that 20 of our SPMs exhibit LINER or Seyfert-like activity (68 per cent), while the remaining 10 galaxies are classified as either star forming (16 per cent) or quiescent (16 per cent). A comparison to the emission-line activity in the ongoing mergers from Darg et al. indicates that the active galactic nuclei (AGN) fraction rises in the post-mergers, suggesting that the AGN phase probably becomes dominant only in the very final stages of the merger process. The optical colours of the SPMs and the plausible mass ratios for their progenitors indicate that, while a minority are consistent with major mergers between two early-type galaxies, the vast majority are remnants of major mergers where at least one progenitor is a late-type galaxy.en
dc.format.extent8
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.titleSpheroidal post-mergers in the local Universeen
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.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84857043400&partnerID=8YFLogxK
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeSubmitted Version
dcterms.dateAccepted2012-03-01
rioxxterms.versionSMUR
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2011.20179.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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