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dc.contributor.authorGieles, Mark
dc.contributor.authorCharbonnel, Corinne
dc.contributor.authorKrause, Martin
dc.contributor.authorHenault-Brunet, Vincent
dc.contributor.authorAgertz, Oscar
dc.contributor.authorLamers, Henny
dc.contributor.authorBastian, Nathan
dc.contributor.authorGualandris, Alessia
dc.contributor.authorZocchi, Alice
dc.contributor.authorPetts, James
dc.date.accessioned2018-08-14T10:03:24Z
dc.date.available2018-08-14T10:03:24Z
dc.date.issued2018-08-01
dc.identifier.citationGieles , M , Charbonnel , C , Krause , M , Henault-Brunet , V , Agertz , O , Lamers , H , Bastian , N , Gualandris , A , Zocchi , A & Petts , J 2018 , ' Concurrent formation of supermassive stars and globular clusters : implications for early self-enrichment ' , Monthly Notices of the Royal Astronomical Society , vol. 478 , no. 2 , pp. 2461–2479 . https://doi.org/10.1093/mnras/sty1059
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 13771005
dc.identifier.otherPURE UUID: c06d0086-8bc4-4645-a0b8-1481364a5a11
dc.identifier.otherArXiv: http://arxiv.org/abs/1804.04682v2
dc.identifier.otherScopus: 85051524550
dc.identifier.otherORCID: /0000-0002-9610-5629/work/63687352
dc.identifier.urihttp://hdl.handle.net/2299/20321
dc.description19 pages, 5 figures, accepted to MNRAS (shortened abstract and included feedback from the community)
dc.description.abstractWe present a model for the concurrent formation of globular clusters (GCs) and supermassive stars (SMSs, ≳10 3M ⊙) to address the origin of the HeCNONaMgAl abundance anomalies in GCs. GCs form in converging gas flows and accumulate low-angular momentum gas, which accretes on to protostars. This leads to an adiabatic contraction of the cluster and an increase of the stellar collision rate. A SMS can form via runaway collisions if the cluster reaches sufficiently high density before two-body relaxation halts the contraction. This condition is met if the number of stars ≳10 6 and the gas accretion rate ≳10 5M ⊙ Myr -1, reminiscent of GC formation in high gas-density environments, such as - but not restricted to - the early Universe. The strong SMS wind mixes with the inflowing pristine gas, such that the protostars accrete diluted hot-hydrogen burning yields of the SMS. Because of continuous rejuvenation, the amount of processed material liberated by the SMS can be an order of magnitude higher than its maximum mass. This 'conveyor-belt' production of hot-hydrogen burning products provides a solution to the mass budget problem that plagues other scenarios. Additionally, the liberated material is mildly enriched in helium and relatively rich in other hot-hydrogen burning products, in agreement with abundances of GCs today. Finally, we find a super-linear scaling between the amount of processed material and cluster mass, providing an explanation for the observed increase of the fraction of processed material with GC mass. We discuss open questions of this new GC enrichment scenario and propose observational tests.en
dc.format.extent19
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectGalaxies: star clusters: general
dc.subjectGlobular clusters: general
dc.subjectStars: abundances
dc.subjectStars: black holes
dc.subjectStars: kinematics and dynamics
dc.subjectSupergiants
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titleConcurrent formation of supermassive stars and globular clusters : implications for early self-enrichmenten
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85051524550&partnerID=8YFLogxK
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2018-08-01
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/sty1059
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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