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dc.contributor.authorYong, David
dc.contributor.authorNorris, John
dc.contributor.authorBessell, Michael
dc.contributor.authorChristlieb, Norbert
dc.contributor.authorAsplund, Martin
dc.contributor.authorBeers, Timothy
dc.contributor.authorBarklem, Paul
dc.contributor.authorFrebel, Anna
dc.contributor.authorRyan, Sean G.
dc.date.accessioned2013-08-05T09:48:18Z
dc.date.available2013-08-05T09:48:18Z
dc.date.issued2013
dc.identifier.citationYong , D , Norris , J , Bessell , M , Christlieb , N , Asplund , M , Beers , T , Barklem , P , Frebel , A & Ryan , S G 2013 , ' The Most Metal-poor Stars. III : The Metallicity Distribution Function and Carbon-enhanced Metal-poor Fraction ' , The Astrophysical Journal , vol. 762 , no. 1 , 27 . https://doi.org/10.1088/0004-637X/762/1/27
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 2153338
dc.identifier.otherPURE UUID: bbddf739-8eb1-41f8-977b-555ab89fd78e
dc.identifier.otherScopus: 84871328839
dc.identifier.otherORCID: /0000-0001-9069-5122/work/30501323
dc.identifier.urihttp://hdl.handle.net/2299/11289
dc.description.abstractWe examine the metallicity distribution function (MDF) and fraction of carbon-enhanced metal-poor (CEMP) stars in a sample that includes 86 stars with [Fe/H] <= -3.0, based on high-resolution, high signal-to-noise spectroscopy, of which some 32 objects lie below [Fe/H] = -3.5. After accounting for the completeness function, the "corrected" MDF does not exhibit the sudden drop at [Fe/H] = -3.6 that was found in recent samples of dwarfs and giants from the Hamburg/ESO survey. Rather, the MDF decreases smoothly down to [Fe/H] = -4.1. Similar results are obtained from the "raw" MDF. We find that the fraction of CEMP objects below [Fe/H] = -3.0 is 23% ± 6% and 32% ± 8% when adopting the Beers & Christlieb and Aoki et al. CEMP definitions, respectively. The former value is in fair agreement with some previous measurements, which adopt the Beers & Christlieb criterion.en
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.subjectearly universe, Galaxy: formation, Galaxy: halo, nuclear reactions, nucleosynthesis, abundances, stars: abundances
dc.titleThe Most Metal-poor Stars. III : The Metallicity Distribution Function and Carbon-enhanced Metal-poor Fractionen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1088/0004-637X/762/1/27
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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