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Long-term optical spectrophotometric monitoring of comet C/1995 O1 (Hale-Bopp)

Rauer, H. and Helbert, J. and Arpigny, C. and Benkhoff, J. and Bockelée-Morvan, D. and Boehnhardt, H. and Colas, F. Bureau de Longitudes, Paris, France), and Crovisier, J. and Hainaut, O. and Jorda, L. and Kueppers, M. and Manfroid, J. and Thomas, N. (2003) Long-term optical spectrophotometric monitoring of comet C/1995 O1 (Hale-Bopp). Astronomy & Astrophysics, 397 (3), pp. 1109-1122.

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Abstract

We observed comet C/1995 O1 (Hale-Bopp) at 4.6-2.9 AU pre-perihelion and 2.8-12.8 AU post-perihelion with optical long-slit spectroscopy. Emission bands of CN, C3, C2 and NH2 have been covered. Emission of C3 was detected up to 7.0 AU and CN could be followed up to 9.8 AU post-perihelion. Spatial column density profiles of the radicals have been used to derive effective parent Haser scale lengths for heliocentric distances beyond 3 AU. Production rates were derived based on these Haser scale lengths. The observations of CN are in agreement with HCN as the major parent molecule of this radical at large distances from the Sun /i.e. beyond ~3 AU). We compare the measured CN production rate to sublimation rates of HCN from a simple nucleaus sublimation model. The variation of CN production rates with changing heliocentric distance gives no indication for sublimation from the interior and is consistent with very little thermal lag of the nucleus.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2003,
Title:Long-term optical spectrophotometric monitoring of comet C/1995 O1 (Hale-Bopp)
Authors:
AuthorsInstitution or Email of Authors
Rauer, H.UNSPECIFIED
Helbert, J.UNSPECIFIED
Arpigny, C.Institut d'Astrophysique et Géophysique, Liège, Belgium
Benkhoff, J.UNSPECIFIED
Bockelée-Morvan, D.Observatoire de Paris-Meudon, Meudon, France
Boehnhardt, H.European Southern Observatory, Santiago de Chile
Colas, F. Bureau de Longitudes, Paris, France), UNSPECIFIED
Crovisier, J.Observatoire de Paris-Meudon, Meudon, France
Hainaut, O.European Southern Observatory, Santiago de Chile
Jorda, L.Laboratoire d'Astrophysique de Marseille, Marseille, France
Kueppers, M.Physikalisches Institut ,Universität Bern, Bern, Switzerland
Manfroid, J.Institut d'Astrophysique et Géophysique, Liège, Belgium
Thomas, N.MPI für Aeronomie, Katlenburg-Lindau, Germany
Date:2003
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:397
Page Range:pp. 1109-1122
Status:Published
Keywords:comets, C/1995 O1 Hale-Bopp
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institut für Weltraumsensorik und Planetenerkundung
Deposited By: elib DLR-Beauftragter
Deposited On:08 Dec 2005
Last Modified:14 Jan 2010 19:17

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