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
- Potential involvement of p53 in ischemia/reperfusion-induced osteonecrosis
- OJ-124 Myocardial Cell Net on the Micropattem-attached Culture Dish(Regeneration(angiogenesis / myocardial regeneration)(02)(M),Oral Presentation (Japanese),The 72nd Annual Scientific Meeting of the Japanese Circulation Society)
- OJ-011 Characteristics and Diagnosis of Patients with Inherited Bidirectional Ventricular Tachycardia(Arrhythmia, diagnosis/ Pathophysiology/ EPS(03)(A),Oral Presentation(Japanese),The 72nd Annual Scientific Meeting of the Japanese Circulation Society)
- OJ-008 Usefulness of the Hot-Bath Test in Brugada Sydrome(Arrhythmia, diagnosis/ Pathophysiology/ EPS(03)(A),Oral Presentation(Japanese),The 72nd Annual Scientific Meeting of the Japanese Circulation Society)
- Numerous aggregates of "tiny" micromegakaryocytes in the bone marrow