マーチソン隕石から採取されたシリコンカルバイド粒子の2型超新星物質
1P. Hoppe, R. Strebel, P. Eberhardt, Physikalisches Institut, Universitat Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland. S. Amari and R. S. Lewis, Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA.
まとめ
マーチソン隕石 (MURCHISON METEORITE) とは,マーチソン隕石 (MURCHISON METEORITE) とは,マーチソン隕石 (MURCHISON
科学分野:
- 宇宙化学 (コスモケミストリー)
- 核天体物理学 核天体物理学とは
- 惑星科学は惑星科学である.
背景:
- 環恒星性炭素化シリコン (SiC) 粒子は,プレソーラー材料である.
- SiC粒子の同位体異常は,恒星の核合成と超新星過程のヒントを提供します.
研究 の 目的:
- マーチソン隕石から発見されたカルビドシリコンの粒 X57 の同位体組成を調べるために.
- 粒 X57.7 で観察された異常な同位体比の起源を決定する.
主な方法:
- シリコン,カルシウム,マグネシウムの同位体分析 SiC粒 X57.7.
- 型II超新星からの核合成産物のモデリング.
主要な成果:
- 穀物X57は,放射性カルシウム-44とマグネシウム-26.6の豊富な濃度を示しています.
- 異常なシリコン同位体成分がX57.7粒で検出されました.
- 推論された初期比: 44Ti/Si = 1.6 x 10(-4),44Ti/48Ti = 0.37,26Al/27Al = 0.11. 推論された初期比: 44Ti/Si = 1.6 x 10(-4),44Ti/48Ti = 0.37,26Al/27Al = 0.11. 推論された初期比: 44Ti/Si = 1.6 x 10(-4),推論された初期比: 44Ti/48Ti = 0.37,26Al/27Al = 0.11.
結論:
- X57の同位体および元素データは,太陽質量25のII型超新星の異なるゾーンからの物質の混合と一致しています.
- 高い44Ti/Si比は,超新星の最も内側のニッケルゾーンからの貢献を示しています.
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