Anomalous Nitrogen Isotope Ratio in Comets-Reference-Cited by-同舟云学术

Anomalous Nitrogen Isotope Ratio in Comets

Published:2003-09-12 Issue:5639 Volume:301 Page:1522-1524
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Arpigny Claude¹²³⁴⁵,Jehin Emmanuël¹²³⁴⁵,Manfroid Jean¹²³⁴⁵,Hutsemékers Damien¹²³⁴⁵,Schulz Rita¹²³⁴⁵,Stüwe J. A.¹²³⁴⁵,Zucconi Jean-Marc¹²³⁴⁵,Ilyin Ilya¹²³⁴⁵

Affiliation:

1. Institut d'Astrophysique et de Géophysique, Sart-Tilman, Bâtiment B5c, B-4000 Liège, Belgium.

2. European Southern Observatory, Casilla 19001, Santiago, Chile.

3. ESA/RSSD, ESTEC, Post Office Box 299, NL-2200 AG Noordwijk, Netherlands.

4. Leiden Observatory, NL-2300 RA Leiden, Netherlands.

5. Observatoire de Besançon, F25010 Besançon Cedex, France.

Abstract

High-resolution spectra of the CN B 2 ∑ + – X 2 ∑ + (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 12 C/ 13 C, 140 ± 35 and 140 ± 30 for 14 N/ 15 N. Our N isotopic measurements are lower than the terrestrial 14 N/ 15 N = 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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference45 articles.

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4. C. Arpignyet al., Bull. Am. Astron. Soc.32, 1074 (2000).

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