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dc.contributor.authorKobayashi, Chiaki
dc.contributor.authorIshigaki, Miho N.
dc.contributor.authorTominaga, Nozomu
dc.contributor.authorNomoto, Ken'ichi
dc.date.accessioned2017-09-13T15:57:05Z
dc.date.available2017-09-13T15:57:05Z
dc.date.issued2014-03-25
dc.identifier.citationKobayashi , C , Ishigaki , M N , Tominaga , N & Nomoto , K 2014 , ' The origin of low [alpha/Fe] ratios in extremely metal-poor stars ' , Astrophysical Journal Letters , vol. 785 , no. 1 . https://doi.org/10.1088/2041-8205/785/1/L5
dc.identifier.issn2041-8205
dc.identifier.otherPURE: 10327652
dc.identifier.otherPURE UUID: 3df9d163-80b7-4172-aa92-e3748bd886ca
dc.identifier.otherArXiv: http://arxiv.org/abs/1403.1796v1
dc.identifier.otherScopus: 84897441483
dc.identifier.urihttp://hdl.handle.net/2299/19373
dc.description© 2014 American Astronomical Society.
dc.description.abstractWe show that the low ratios of $\alpha$ elements (Mg, Si, and Ca) to Fe recently found for a small fraction of extremely metal-poor stars can be naturally explained with the nucleosynthesis yields of core-collapse supernovae, i.e., $13-25M_\odot$ supernovae, or hypernovae. For the case without carbon enhancement, the ejected iron mass is normal, consistent with observed light curves and spectra of nearby supernovae. On the other hand, the carbon enhancement requires much smaller iron production, and the low [$\alpha$/Fe] of carbon enhanced metal-poor stars can also be reproduced with $13-25M_\odot$ faint supernovae or faint hypernovae. Iron-peak element abundances, in particular Zn abundances, are important to put further constraints on the enrichment sources from galactic archaeology surveys.en
dc.format.extent5
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal Letters
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.subjectgalaxies: abundances
dc.subjectgalaxies: evolution
dc.subjectstars: abundances
dc.subjectstars: population III
dc.subjectsupernovae: general
dc.titleThe origin of low [alpha/Fe] ratios in extremely metal-poor starsen
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.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2014-03-07
rioxxterms.versionAM
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1088/2041-8205/785/1/L5
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeopenAccess


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