Isotopic abundances of carbon and nitrogen in Jupiter-family and Oort Cloud comets

Hutsemekers, Damien; Manfroid, Jean; Jehin, Emmanuel; Arpigny, Claude; Cochran, A.; Schulz, R.; Stüwe, J. A.; Zucconi, J.-M.

doi:10.1051/0004-6361:200500160

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Isotopic abundances of carbon and nitrogen in Jupiter-family and Oort Cloud comets

Hutsemekers, Damien; Manfroid, Jean; Jehin, Emmanuel et al.

2005 • In Astronomy and Astrophysics, 440 (Letters), p. 21-24

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/30819

DOI
10.1051/0004-6361:200500160

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Keywords :

comets: abundances; comets: individual: 88P/Howell; comets: individual: C/1999 S4 (LINEAR)

Abstract :

[en] The [SUP]12[/SUP]C[SUP]14[/SUP]N/[SUP]12[/SUP]C[SUP]15[/SUP]N and [SUP]12[/SUP]C[SUP]14[/SUP]N/[SUP]13[/SUP]C[SUP]14[/SUP]N isotopic ratios are determined for the first time in a Jupiter-family comet, 88P/1981 Q1 Howell, and in the chemically peculiar Oort Cloud comet C/1999 S4 (LINEAR). By comparing these measurements to previous ones derived for six other Oort Cloud comets (including one of Halley-type), we find that both the carbon and nitrogen isotopic ratios are constant within the uncertainties. The mean values are [SUP]12[/SUP]C/[SUP]13[/SUP]C ~= 90 and [SUP]14[/SUP]N/[SUP]15[/SUP]N ~=145 for the eight comets. These results strengthen the view that CN radicals originate from refractory organics formed in the protosolar molecular cloud and subsequently incorporated in comets.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Hutsemekers, Damien ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)

Manfroid, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)

Jehin, Emmanuel ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image

Arpigny, Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)

Cochran, A.; Department of Astronomy and McDonald Observatory, University of Texas at Austin, C-1400, Austin, USA

Schulz, R.; ESA/RSSD, ESTEC, PO Box 299, 2200 AG Noordwijk, The Netherlands

Stüwe, J. A.; Leiden Observatory, 2300 RA Leiden, The Netherlands

Zucconi, J.-M.; Observatoire de Besançon, 25010 Besançon Cedex, France

Language :

English

Title :

Isotopic abundances of carbon and nitrogen in Jupiter-family and Oort Cloud comets

Publication date :

01 September 2005

Journal title :

Astronomy and Astrophysics

ISSN :

0004-6361

eISSN :

1432-0746

Publisher :

EDP Sciences, Les Ulis, France

Volume :

440

Issue :

Letters

Pages :

21-24

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2005A%26A...440L..21H
http://de.arxiv.org/abs/astro-ph/0508033

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