Article (Scientific journals)
Isotopic abundance of nitrogen and carbon in distant comets
Manfroid, Jean; Jehin, Emmanuel; Hutsemekers, Damien et al.
2005In Astronomy and Astrophysics, 432 (Letters), p. 5-8
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Keywords :
comets: abundances; comets: individual: C/1995 O1 (Hale-Bopp); C/2001 Q4 (NEAT); C/2003 K4 (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 have been determined in comets C/1995 O1 (Hale-Bopp), C/2001 Q4 (NEAT) and C/2003 K4 (LINEAR) at heliocentric distances of, respectively, 2.7, 3.7 and 2.6 AU. These ratios have also been measured at rË 1 AU. No significant differences were found between all determinations, nor with the value obtained for other comets. If confirmed, the discrepancy between the nitrogen isotopic ratios from optical and millimeter measurements on CN and HCN would rule out HCN as a major parent of the cometary CN radicals. Based on observations collected at the European Southern Observatory, Paranal, Chile (ESO Programmes 270.C-5043, 073.C-0525 and 274.C-5015).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
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
Hutsemekers, Damien ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Cochran, A.;  Department of Astronomy and McDonald Observatory, University of Texas at Austin, C-1400 Austin, USA
Zucconi, J.-M.;  Observatoire de Besançon, 25010 Besançon Cedex, France
Arpigny, Claude ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Schulz, R.;  ESA/RSSD, ESTEC, PO Box 299, 2200 AG Noordwijk, The Netherlands
Stüwe, J. A.;  Leiden Observatory, 2300 RA Leiden, The Netherlands
Language :
English
Title :
Isotopic abundance of nitrogen and carbon in distant comets
Publication date :
01 March 2005
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
432
Issue :
Letters
Pages :
5-8
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 February 2010

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