SPECTROSCOPIC STUDIES OF EXTREMELY METAL-POOR STARS WITH THE SUBARU HIGH DISPERSION SPECTROGRAPH. V. THE Zn-ENHANCED METAL-POOR STAR BS 16920-017
スポンサーリンク
概要
- 論文の詳細を見る
We report Zn abundances for 18 very metal-poor stars studied in our previous work, covering the metallicity range –3.2< [Fe/H] <–2.5. The [Zn/Fe] values of most stars show an increasing trend with decreasing [Fe/H] in this metallicity range, confirming the results found by previous studies. However, the extremely metal-poor star BS 16920-017([Fe/H] =–3.2) exhibits a significantly high [Zn/Fe] ratio ([Zn/Fe] = +1.0). Comparison of the chemical abundances of this object with HD 4306, which has similar atmospheric parameters to BS 16920-017, clearly demonstrates a deficiency of α elements and neutron-capture elements in this star, along with enhancements of Mn and Ni, as well as Zn. The association with a hypernova explosion that has been proposed to explain the high Zn abundance ratios found in extremely metal-poor stars is a possible explanation, although further studies are required to fully interpret the abundance pattern of this object.
- 2011-04-01
論文 | ランダム
- M&A 戦略的M&Aに向けた日本企業の経営を探る(後編)生き残りのための戦略的合併の動向
- M&A 戦略的M&Aに向けた日本企業の経営を探る(前編)事業構造改革がM&Aを加速する
- ビジネスモデル特許と日本の対応
- 新世紀プロジェクト(4)ナレッジとITを活用し「閃き人間」に変わる--セルフイメージを乗り越え、未知なる資源を発見するために
- 飯野弘之 著『技術者になるということ』 : これからの社会と技術者, 雄松堂, (1998年2月), \2,000