Carbon and nitrogen isotopic anomalies in an anhydrous interplanetary dust particle

被引:98
作者
Floss, C [1 ]
Stadermann, FJ
Bradley, J
Dai, ZR
Bajt, S
Graham, G
机构
[1] Washington Univ, Space Sci Lab, St Louis, MO 63130 USA
[2] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA
关键词
D O I
10.1126/science.1093283
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
Because hydrogen and nitrogen isotopic anomalies in interplanetary dust particles have been associated with carbonaceous material, the lack of similar anomalies in carbon has been a major conundrum. We report here the presence of a C-13 depletion associated with a N-15 enrichment in an anhydrous interplanetary dust particle. Our observations suggest that the anomalies are carried by heteroatomic organic compounds. Theoretical models indicate that low-temperature formation of organic compounds in cold interstellar molecular clouds can produce carbon and nitrogen fractionations, but it remains to be seen whether the specific effects observed here can be reproduced.
引用
收藏
页码:1355 / 1358
页数:4
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