{"title":"Oxygen abundances: new results from [O I] lines","authors":"C. Sneden, F. Primas","doi":"10.1017/S1539299600013927","DOIUrl":null,"url":null,"abstract":"Abstract Supersolar oxygen-to-iron ratios are known to exist in nearly all metal-poor stars. But there is no general agreement on the magnitude of these relative overabundances. New high resolution spectra of evolved stars over a large metallicity range have been gathered, from which lines of [O I], Sc II, and Fe II have been measured. Abundance ratios [O/Sc] and [O/Fe], insensitive to most model atmospheric uncertainties, have been derived and correlated with overall metallicity. These ratios both are consistent with earlier studies of the [O I] lines in metal-poor stars: [O/Sc]≃[O/Fe]≃+0.4, with possibly a small upward trend with decreasing [Fe/H].","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"29 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Highlights of Astronomy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1017/S1539299600013927","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
Abstract
Abstract Supersolar oxygen-to-iron ratios are known to exist in nearly all metal-poor stars. But there is no general agreement on the magnitude of these relative overabundances. New high resolution spectra of evolved stars over a large metallicity range have been gathered, from which lines of [O I], Sc II, and Fe II have been measured. Abundance ratios [O/Sc] and [O/Fe], insensitive to most model atmospheric uncertainties, have been derived and correlated with overall metallicity. These ratios both are consistent with earlier studies of the [O I] lines in metal-poor stars: [O/Sc]≃[O/Fe]≃+0.4, with possibly a small upward trend with decreasing [Fe/H].
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
