dc.contributor.author | Yong, David | |
dc.contributor.author | Norris, John | |
dc.contributor.author | Bessell, Michael | |
dc.contributor.author | Christlieb, Norbert | |
dc.contributor.author | Asplund, Martin | |
dc.contributor.author | Beers, Timothy | |
dc.contributor.author | Barklem, Paul | |
dc.contributor.author | Frebel, Anna | |
dc.contributor.author | Ryan, Sean G. | |
dc.date.accessioned | 2013-08-05T09:48:18Z | |
dc.date.available | 2013-08-05T09:48:18Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | Yong , 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.issn | 0004-637X | |
dc.identifier.other | ORCID: /0000-0001-9069-5122/work/30501323 | |
dc.identifier.uri | http://hdl.handle.net/2299/11289 | |
dc.description.abstract | We 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.format.extent | 446148 | |
dc.language.iso | eng | |
dc.relation.ispartof | The Astrophysical Journal | |
dc.subject | early universe, Galaxy: formation, Galaxy: halo, nuclear reactions, nucleosynthesis, abundances, stars: abundances | |
dc.title | The Most Metal-poor Stars. III : The Metallicity Distribution Function and Carbon-enhanced Metal-poor Fraction | en |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1088/0004-637X/762/1/27 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |