ORBi: Schulz R. - Isotopic abundance in the CN coma of comets: Ten years of measurements

Reference : Isotopic abundance in the CN coma of comets: Ten years of measurements


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/22314

Title :	Isotopic abundance in the CN coma of comets: Ten years of measurements
Language :	English
Author, co-author :	Schulz, R. [Research and Scientific Support Department, ESA, Postbus 299, 2200 AG Noordwijk, The Netherlands]
	Jehin, Emmanuel [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
	Manfroid, Jean [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
	Hutsemekers, Damien [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
	Arpigny, Claude [Université de Liège - ULg > 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, Austin, TX 1400, USA]
	Zucconi, J-M [Observatoire de BesanÃ§on, F25010 BesanÃ§on Cedex, France]*
	Stuwe [ > > ]
Publication date :	1-Nov-2008
Journal title :	Planetary and Space Science
Publisher :	Pergamon Press - An Imprint of Elsevier Science
Volume :	56
Pages :	1713-1718
Audience :	International
ISSN :	0032-0633
City :	Oxford
Country :	United Kingdom
Abstract :	[en] Over the past 10 years the isotopic ratios of carbon ([SUP]12[/SUP]C/[SUP]13[/SUP]C) and nitrogen ([SUP]14[/SUP]N/[SUP]15[/SUP]N) have been determined for a dozen comets, bright enough to allow obtaining the required measurements from the ground. The ratios were derived from high-resolution spectra of the CN coma measured in the B[SUP]2[/SUP]â [SUP]+[/SUP]â X[SUP]2[/SUP]â [SUP]+[/SUP] (0, 0) emission band around 387 nm. The observed comets belong to different dynamical classes, including dynamically new as well as long- and short-period comets from the Halley- and Jupiter-family. In some cases the comets could be observed at various heliocentric distances. All values determined for the carbon and nitrogen isotopic ratios were consistent within the error margin irrespective of the type of comet or the heliocentric distance at which it was observed. Our investigations resulted in average ratios of [SUP]12[/SUP]C/[SUP]13[/SUP]C=91Â±21 and nitrogen [SUP]14[/SUP]N/[SUP]15[/SUP]N=141Â±29. Whilst the value for the carbon isotopic ratio is in good agreement with the solar and terrestrial value of 89, the nitrogen isotopic ratio is very different from the telluric value of 272.
Target :	Researchers ; Students
Permalink :	http://hdl.handle.net/2268/22314
DOI :	10.1016/j.pss.2008.08.001
Other URL :	http://cdsads.u-strasbg.fr/abs/2008P%26SS...56.1713S

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Restricted access	sdarticle.pdf		Publisher postprint	541.56 kB	Request copy

All documents in ORBi are protected by a user license.

Dspace v1.5