Swan bands in the spectrum of Comet Halley

Details Swan bands in the spectrum of Comet Halley Swan bands in the spectrum of Comet Halley

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991kfnt....7...15a&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 7, Nov.-Dec. 1991, p. 15-20. In Russian.

Astronomy and Astrophysics

Astronomy

Astronomical Spectroscopy, Cometary Atmospheres, Halley'S Comet, Swan Bands, Thermodynamic Equilibrium, Astronomical Photometry, Atmospheric Composition, Emission Spectra, Molecular Excitation

Scientific paper

Spectrophotometric observations of Comet Halley made during December 1985-January 1986 are analyzed. The emission bands of Swan C2 (2.0) 438.2 nm and CN(B2Sigma/+/ - X2Sigma/+/) near 420.0 nm are identified. The excitation temperature of C2 molecules in the comet's atmosphere (for the thermodynamic equilibrium) is 5900-6500 K for C2 (1.0) 473.7 nm and 5900-6700 K for C2 (0.1) 563.5 nm. The formation of C2 molecules in the comet's atmosphere before and after perihelion occurs at different rates.

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