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Spectral observations of comet C/2000 WM1 (LINEAR) in Mexico

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Preliminary analysis of intermediate-resolution optical spectra of comet C/2000 WM1 (LINEAR) obtained on November 22-24, 2001, and April 5, 2002, is given. The emission lines of the C2, C3, CN, NH2 and presumably CO (Asundi and triplet bands) molecules and H2O+ and C2 ions were identified in these spectra. By analysing the brightness distributions of the C2, C3 and CN emission lines along the spectrograph slit we determined some physical parameters of these neutral molecules:, the velocity of expansion of molecules within the coma and their lifetimes. The Franck-Condon factors for the CO Asundi bands and C2 bands were calculated using a Morse potential model.

Keywords: Comet C/2000 WM1 (LINEAR); Expansion velocity; Franck-Condon factors; Gas species C2, C3 and CN; Negative ions; Optical spectroscopy; Physical parameters; Profile

Document Type: Research Article


Affiliations: 1: Kyiv National Shevchenko University Astronomical Observatory Observatorna St 3 Kyiv 04053 Ukraine 2: Optica y Electronica Instituto Nacional de Astrofisica Tonantzintla Puebla Mexico 3: Benemerita Universidad Autonoma de Puebla Puebla Mexico 4: Vinnytsia Kotsubynsky Pedagogical University Vinnytsia Ukraine

Publication date: August 1, 2003

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