METEORITIC SILICON-CARBIDE - PRISTINE MATERIAL FROM CARBON STARS

被引：143

作者：

LEWIS, RS ^{[1
]}

AMARI, S ^{[1
]}

ANDERS, E ^{[1
]}

机构：

[1] UNIV CHICAGO, DEPT CHEM, CHICAGO, IL 60637 USA

来源：

NATURE | 1990年 / 348卷 / 6299期

关键词：

D O I：

10.1038/348293a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

All five noble gases in interstellar silicon carbide grains have grossly non-solar isotopic and elemental abundances that vary with grain size but are strikingly similar to calculated values for the helium-burning shell of low-mass carbon stars. Apparently these grains formed in carbon-star envelopes, and were impregnated with noble gas ions from a stellar wind. Meteoritic SiC provides a detailed record of nuclear and chemical processes in carbon stars. © 1990 Nature Publishing Group.

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页码：293 / 298

页数：6

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