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dc.contributor.authorBoardman, N. F.
dc.contributor.authorWeijmans, A.
dc.contributor.authorBosch, R. C. E. van den
dc.contributor.authorZhu, L.
dc.contributor.authorYildirim, A.
dc.contributor.authorVen, G. van de
dc.contributor.authorCappellari, M.
dc.contributor.authorZeeuw, P. T. de
dc.contributor.authorEmsellem, E.
dc.contributor.authorKrajnović, D.
dc.contributor.authorNaab, T.
dc.date.accessioned2016-06-16T16:30:07Z
dc.date.available2016-06-16T16:30:07Z
dc.date.issued2016-08-11
dc.identifier.citationBoardman , N F , Weijmans , A , Bosch , R C E V D , Zhu , L , Yildirim , A , Ven , G V D , Cappellari , M , Zeeuw , P T D , Emsellem , E , Krajnović , D & Naab , T 2016 , ' The low dark matter content of the lenticular galaxy NGC 3998 ' , Monthly Notices of the Royal Astronomical Society , vol. 460 , no. 3 , pp. 3029-3043 . https://doi.org/10.1093/mnras/stw1187en
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 242703985
dc.identifier.otherPURE UUID: 3c303eca-4047-4ac3-809a-a41ea55107a4
dc.identifier.otherArXiv: http://arxiv.org/abs/1605.04795v1
dc.identifier.otherScopus: 84983261359
dc.identifier.otherORCID: /0000-0002-5908-6852/work/40233467
dc.identifier.otherWOS: 000381204600055
dc.identifier.urihttps://hdl.handle.net/10023/9000
dc.description.abstractWe observed the lenticular galaxy NGC 3998 with the Mitchell Integral-Field Spectrograph and extracted line-of-sight velocity distributions out to three half-light radii. We constructed collisionless orbit models in order to constrain NGC 3998's dark and visible structure, using kinematics from both the Mitchell and SAURON instruments. We find NGC 3998 to be almost axisymmetric, seen nearly face-on with a flattened intrinsic shape – i.e. a face-on fast rotator. We find an I-band mass-to-light ratio of 4.7 +0.32/−0.45 in good agreement with previous spectral fitting results for this galaxy. Our best-fitting orbit model shows a both a bulge and a disc component, with a non-negligible counter-rotating component also evident. We find that relatively little dark matter is needed to model this galaxy, with an inferred dark mass fraction of just 7.1 +8.1/−7.1 percent within one half-light radius.
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rights© 2016, 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 mnras.oxfordjournals.org / https://dx.doi.org/10.1093/mnras/stw1187en
dc.subjectDark matteren
dc.subjectGalaxies: elliptical and lenticular, CDen
dc.subjectGalaxies: ISMen
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectGalaxies: structureen
dc.subjectISM: kinematics and dynamicsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleThe low dark matter content of the lenticular galaxy NGC 3998en
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.sponsorPPARC - Now STFCen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1093/mnras/stw1187
dc.description.statusPeer revieweden
dc.identifier.grantnumberECF-2014-767en
dc.identifier.grantnumberST/I000666/1en
dc.identifier.grantnumberPP/D000890/1en
dc.identifier.grantnumberST/M001296/1en
dc.identifier.grantnumberST/G001006/1en


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