Show simple item record

Files in this item

Thumbnail

Item metadata

dc.contributor.authorFerreras, I.
dc.contributor.authorHopkins, A. M.
dc.contributor.authorGunawardhana, M. L. P.
dc.contributor.authorSansom, A. E.
dc.contributor.authorOwers, M. S.
dc.contributor.authorDriver, S.
dc.contributor.authorDavies, L.
dc.contributor.authorRobotham, A.
dc.contributor.authorTaylor, E. N.
dc.contributor.authorKonstantopoulos, I.
dc.contributor.authorBrough, S.
dc.contributor.authorNorberg, P.
dc.contributor.authorCroom, S.
dc.contributor.authorLoveday, J.
dc.contributor.authorWang, L.
dc.contributor.authorBremer, M.
dc.date.accessioned2017-04-26T15:30:15Z
dc.date.available2017-04-26T15:30:15Z
dc.date.issued2017-06-11
dc.identifier.citationFerreras , I , Hopkins , A M , Gunawardhana , M L P , Sansom , A E , Owers , M S , Driver , S , Davies , L , Robotham , A , Taylor , E N , Konstantopoulos , I , Brough , S , Norberg , P , Croom , S , Loveday , J , Wang , L & Bremer , M 2017 , ' Galaxy and Mass Assembly (GAMA) : probing the merger histories of massive galaxies via stellar populations ' , Monthly Notices of the Royal Astronomical Society , vol. 468 , no. 1 , pp. 607-619 . https://doi.org/10.1093/mnras/stx503en
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 249837828
dc.identifier.otherPURE UUID: 8761ec1a-94d2-491f-831f-8e75f5765cbc
dc.identifier.otherScopus: 85017261257
dc.identifier.otherWOS: 000398419200045
dc.identifier.urihttps://hdl.handle.net/10023/10664
dc.description.abstractThe merging history of galaxies can be traced with studies of dynamically close pairs. These consist of a massive primary galaxy and a less massive secondary (or satellite) galaxy. The study of the stellar populations of secondary (lower mass) galaxies in close pairs provides a way to understand galaxy growth by mergers. Here we focus on systems involving at least one massive galaxy - with stellar mass above 1011M⊙ in the highly complete Galaxy and Mass Assembly (GAMA) survey. Our working sample comprises 2692 satellite galaxy spectra (0.1 < z < 0.3). These spectra are combined into high S/N stacks, and binned according to both an 'internal' parameter, the stellar mass of the satellite galaxy (i.e. the secondary), and an 'external' parameter, selecting either the mass of the primary in the pair, or the mass of the corresponding dark matter halo. We find significant variations in the age of the populations with respect to environment. At fixed mass, satellites around the most massive galaxies are older and possibly more metal-rich, with age differences ~1-2 Gyr within the subset of lower mass satellites (~1010 M⊙). These variations are similar when stacking with respect to the halo mass of the group where the pair is embedded. The population trends in the lower mass satellites are consistent with the old stellar ages found in the outer regions of massive galaxies.
dc.format.extent13
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rights© 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1093/mnras/stx503en
dc.subjectGalaxies: evolutionen
dc.subjectGalaxies: formationen
dc.subjectGalaxies: interactionsen
dc.subjectGalaxies: stellar contenten
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectAstronomy and Astrophysicsen
dc.subjectSpace and Planetary Scienceen
dc.subject3rd-DASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleGalaxy and Mass Assembly (GAMA) : probing the merger histories of massive galaxies via stellar populationsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1093/mnras/stx503
dc.description.statusPeer revieweden


This item appears in the following Collection(s)

Show simple item record