THE ISOTOPIC COMPOSITIONS AND STELLAR SOURCES OF METEORITIC GRAPHITE GRAINS

被引：50

作者：

AMARI, S

HOPPE, P

ZINNER, E

LEWIS, RS

机构：

[1] UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637

[2] WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130

来源：

NATURE | 1993年 / 365卷 / 6449期

关键词：

Isotopic compositions - Meteoritic graphite grains - Stellar sources;

D O I：

10.1038/365806a0

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：

The isotopic compositions of interstellar graphite grains in meteorites provide a record of the stellar environments in which they formed.The grains have C-12/C-13 ratios that range far from the terrestrial value, as well as large variations in N-14/N-15 and O-16/O-18, and pronounced Mg-29 excesses from the decay of extinct Al-26. This isotopic variability indicates several types of stellar source, including asymptotic giant branch stars, Wolf-Rayet stars and novae.

引用

页码：806 / 809

页数：4

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