Reference : On the interpretation of the CH cometary spectrum

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/231

Title :	On the interpretation of the CH cometary spectrum
Language :	English
Author, co-author :	Arpigny, Claude [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
	Zeippen, C. J. [> > > >]
	Klutz, M. [> > > >]
	Magain, Pierre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
	Hutsemekers, Damien [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Publication date :	1987
Main document title :	Diversity and Similarity of Comets
Volume :	278
Pages :	607-612
Audience :	International
Keywords :	[en] COMETS ; EMISSION SPECTRA ; HYDROCARBONS ; RADICALS ; ABUNDANCE ; MOLECULAR EXCITATION ; MOLECULAR ROTATION ; RADIATION CHEMISTRY
Abstract :	[en] A procedure to compute cometary spectra taking into account radiative processes and collisional effects is described. The populations of the rotational levels are determined by solving the statistical equilibrium equations at a certain number of locations within the coma (which can be modelled with n(R), T(R), v(R) laws) and the emerging intensity is then evaluated by integrating the emissions along the line of sight. Such a program was applied to the CH radical. The importance of collisions in exciting the lower rotational levels of CH is confirmed.
Permalink :	http://hdl.handle.net/2268/231

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