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
收藏
页码：806 / 809
页数：4
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