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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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.
|Title:||Long-term optical spectrophotometric monitoring of comet C/1995 O1 (Hale-Bopp)|
|Journal or Publication Title:||Astronomy & Astrophysics|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1109-1122|
|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|
|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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