气候变化领域集成服务门户(CCPortal): Type II supernova matter in a silicon carbide grain from the Murchison meteorite

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DOI	10.1126/science.272.5266.1314
	Type II supernova matter in a silicon carbide grain from the Murchison meteorite
	Hoppe P.; Strebel R.; Eberhardt P.; Amari S.; Lewis R.S.
发表日期	1996
ISSN	0036-8075
起始页码	1314
结束页码	1316
卷号	272 期号:5266
英文摘要	The circumstellar silicon carbide (SiC) grain X57 from the Murchison meteorite contains large amounts of radiogenic calcium-44 (20 times its solar system abundance) and has an anomalous silicon isotopic composition, different from other circumstellar SiC grains. Its inferred initial 44Ti/Si and 44Ti/48Ti ratios are 1.6 × 10-4 and 0.37. In addition, it contains radiogenic magnesium-26; the inferred initial 26Al/27Al ratio is 0.11. The isotopic and elemental data of X57 can be explained by selective mixing of matter from different zones of a typical type II supernova of 25 solar masses during its explosion. The high 44Ti/Si ratio requires contributions from the innermost nickel zone of the supernova to the SiC condensation site, as similarly suggested by astronomical observations.
英文关键词	carbonaceous chondrite; isotopic composition; Murchison meteorite; silicon carbide; supernova type II
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244057
作者单位	Physikalisches Institut, Universität Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland; Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, United States; McDonnell Center, Space Sci. and Physics Department, Washington University, St. Louis, MO 63130, United States
推荐引用方式 GB/T 7714	Hoppe P.,Strebel R.,Eberhardt P.,et al. Type II supernova matter in a silicon carbide grain from the Murchison meteorite[J],1996,272(5266).
APA	Hoppe P.,Strebel R.,Eberhardt P.,Amari S.,&Lewis R.S..(1996).Type II supernova matter in a silicon carbide grain from the Murchison meteorite.Science,272(5266).
MLA	Hoppe P.,et al."Type II supernova matter in a silicon carbide grain from the Murchison meteorite".Science 272.5266(1996).