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dc.contributor.authorCappellari, Michele
dc.contributor.authorMcDermid, Richard M.
dc.contributor.authorAlatalo, Katherine
dc.contributor.authorBlitz, Leo
dc.contributor.authorBois, Maxime
dc.contributor.authorBournaud, Frederic
dc.contributor.authorBureau, M.
dc.contributor.authorCrocker, Alison F.
dc.contributor.authorDavies, Roger L.
dc.contributor.authorDavis, Timothy A.
dc.contributor.authorde Zeeuw, P. T.
dc.contributor.authorDuc, Pierre-Alain
dc.contributor.authorEmsellem, Eric
dc.contributor.authorKhochfar, Sadegh
dc.contributor.authorKrajnovic, Davor
dc.contributor.authorKuntschner, Harald
dc.contributor.authorLablanche, Pierre-Yves
dc.contributor.authorMorganti, Raffaella
dc.contributor.authorNaab, Thorsten
dc.contributor.authorOosterloo, Tom
dc.contributor.authorSarzi, Marc
dc.contributor.authorScott, Nicholas
dc.contributor.authorSerra, Paolo
dc.contributor.authorWeijmans, Anne-Marie
dc.contributor.authorYoung, Lisa M.
dc.date.accessioned2012-07-30T14:00:45Z
dc.date.available2012-07-30T14:00:45Z
dc.date.issued2012-04-26
dc.identifier.citationCappellari , M , McDermid , R M , Alatalo , K , Blitz , L , Bois , M , Bournaud , F , Bureau , M , Crocker , A F , Davies , R L , Davis , T A , de Zeeuw , P T , Duc , P-A , Emsellem , E , Khochfar , S , Krajnovic , D , Kuntschner , H , Lablanche , P-Y , Morganti , R , Naab , T , Oosterloo , T , Sarzi , M , Scott , N , Serra , P , Weijmans , A-M & Young , L M 2012 , ' Systematic variation of the stellar initial mass function in early-type galaxies ' , Nature , vol. 484 , no. 7395 , pp. 485-488 . https://doi.org/10.1038/nature10972
dc.identifier.issn0028-0836
dc.identifier.otherPURE: 952054
dc.identifier.otherPURE UUID: 871c5789-0b9d-45b7-8216-95944cd4bfae
dc.identifier.otherWOS: 000303200400044
dc.identifier.otherScopus: 84860231948
dc.identifier.urihttp://hdl.handle.net/2299/8746
dc.description.abstractMuch of our knowledge of galaxies comes from analysing the radiation-emitted by their stars, which depends on the present number of each type of star in the galaxy. The present number depends on the stellar initial mass function (IMF), which describes the distribution of stellar masses when the population formed, and knowledge of it is critical to almost every aspect of galaxy evolution. More than 50 years after the first IMF determination(1), no consensus has emerged on whether it is universal among different types of galaxies(2). Previous studies indicated that the IMF and the dark matter fraction in galaxy centres cannot both be universal(3-7), but they could not convincingly discriminate between the two possibilities. Only recently were indications found that massive elliptical galaxies may not have the same IMF as the Milky Way(8). Here we report a study of the two-dimensional stellar kinematics for the large representative ATLAS(3D) sample(9) of nearby early-type galaxies spanning two orders of magnitude in stellar mass, using detailed dynamical models. We find a strong systematic variation in IMF in early-type galaxies as a function of their stellar mass-to-light ratios, producing differences of a factor of up to three in galactic stellar mass. This implies that a galaxy's IMF depends intimately on the galaxy's formation history.en
dc.format.extent4
dc.language.isoeng
dc.relation.ispartofNature
dc.rightsEmbargoed
dc.titleSystematic variation of the stellar initial mass function in early-type galaxiesen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.description.statusPeer reviewed
dc.date.embargoedUntil2012-11-01
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2012-04-26
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1038/nature10972
rioxxterms.licenseref.startdate2012-11-01
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.date.embargo2012-11-01
herts.rights.accesstypeEmbargoed


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