Anomalous nitrogen isotope ratio in comets

被引：85

作者：

Arpigny, C

Jehin, E

Manfroid, J

Hutsemékers, D

Schulz, R

Stüwe, JA

Zucconi, JM

Ilyin, I

机构：

[1] Inst Astrophys & Geophys, B-4000 Liege, Belgium

[2] European So Observ, Santiago 19, Chile

[3] European Space Technol Ctr, European Space Agcy, RSSD, NL-2200 AG Noordwijk, Netherlands

[4] Leiden Observ, NL-2300 RA Leiden, Netherlands

[5] Observ Besancon, F-25010 Besancon, France

[6] Univ Oulu, Astron Div, FIN-90014 Oulu, Finland

来源：

SCIENCE | 2003年 / 301卷 / 5639期

关键词：

D O I：

10.1126/science.1086711

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：

High-resolution spectra of the CN B-2 Sigma(+)- X-2 Sigma(+) (0,0) band at 390 nanometers yield isotopic ratios for comets C/ 1995 O1 (Hale-Bopp) and C/ 2000 WM1 (LINEAR) as follows: 165 +/- 40 and 115 +/- 20 for C-12/C-13, 140 +/- 35 and 140 +/- 30 for N-14/N-15. Our N isotopic measurements are lower than the terrestrial N-14/N-15 = 272 and the ratio for Hale-Bopp from measurements of HCN, the presumed parent species of CN. This isotopic anomaly suggests the existence of other parent(s) of CN, with an even lower N isotopic ratio. Organic compounds like those found in interplanetary dust particles are good candidates.

引用

页码：1522 / 1524

页数：3

共 38 条

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