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Volumn 301, Issue 5639, 2003, Pages 1522-1524

Anomalous nitrogen isotope ratio in comets

Author keywords

[No Author keywords available]

Indexed keywords

CARBON NITRIDE; DUST;

EID: 0141818362     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1086711     Document Type: Article
Times cited : (94)

References (45)
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    • note
    • Material and methods are available as supporting material on Science online.
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  • 5
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    • note
    • 13C ratio (up to 5000) was measured in a number of small C-rich grains in P/Halley, the only comet for which compositional data about the "dust" are available. [E. K. Jessberger, Space Sci. Rev. 90, 91 (1999), and references therein.] Jessberger suggests that a link exists between the cometary dust, IDPS, and circumstellar grains.
  • 10
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    • note
    • 14N. A new analysis of some of these comets is under way.
  • 16
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    • An excellent recent review of these questions is to be found in L. M. Woodney et al., Icarus 157, 193 (2002).
    • (2002) Icarus , vol.157 , pp. 193
    • Woodney, L.M.1
  • 17
    • 0000565535 scopus 로고
    • These "CHON" grains, rich in the light elements (H, C, N, and O), were discovered in the coma of Halley's comet; they are tiny (submicrometer- to micrometer-sized) particulates containing complex organic compounds of low degrees of volatility (5). M. F. A'Hearn et al. [Nature 324, 649 (1986)] first suggested that CN radicals may be released from CHON grains.
    • (1986) Nature , vol.324 , pp. 649
    • A'Hearn, M.F.1
  • 18
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    • note
    • 3 km from the comet nucleus.
  • 21
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    • J. R. Walsh, M. R. Rosa, Eds. (Springer-Verlag, Berlin)
    • C. Henkel et al., in Chemical Evolution from Zero to High Redshift, J. R. Walsh, M. R. Rosa, Eds. (Springer-Verlag, Berlin, 1999), pp. 104-108.
    • (1999) Chemical Evolution From Zero to High Redshift , pp. 104-108
    • Henkel, C.1
  • 23
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    • note
    • 14N is a secondary element produced by long-lived low- and intermediate-mass stars (19, 20, 21).
  • 27
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    • E. Grün et al., Eds. (Springer-Verlag, Berlin)
    • E. K. Jessberger et al., in Interplanetary Dust, E. Grün et al., Eds. (Springer-Verlag, Berlin, 2001), pp. 253-294.
    • (2001) Interplanetary Dust , pp. 253-294
    • Jessberger, E.K.1
  • 35
    • 0141717387 scopus 로고    scopus 로고
    • note
    • We thank S. B. Charnley for the suggestion concerning "HCN polymers."
  • 38
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    • A. L. Cochran et al., Icarus 146, 583 (2000).
    • (2000) Icarus , vol.146 , pp. 583
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  • 40
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    • note
    • 14N)⊕ - 1]
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    • K. Hashizume et al., Science 290, 1142 (2000).
    • (2000) Science , vol.290 , pp. 1142
    • Hashizume, K.1
  • 45
    • 0141717390 scopus 로고    scopus 로고
    • note
    • Based on observations of comet Hale-Bopp made with the Nordic Optical Telescope, La Palma, Canary Islands, Spain. The WM1 observations were carried out at the ESO. We thank the director of the ESO VLT for approving our program for Director's Discretionary Time (ESO DDT 268.C-5570). We also thank the observatory staff astronomers who have carried out these observations. The authors are grateful to J. Aléon for useful discussions. C.A., J.M., and D.H. acknowledge financial support from the Belgian NFSR.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.