Emission band and continuum photometry of Comet West /1975n/. II Emission profiles of the neutral coma, lifetimes of molecules and distribution of the molecules and dust within the coma

Details Emission band and continuum photometry of Comet West /1975n/. II Emission profiles of the neutral coma, lifetimes of molecules and distribution of the molecules and dust within the coma Emission band and continuum photometry of Comet West /1975n/. II Emission profiles of the neutral coma, lifetimes of molecules and distribution of the molecules and dust within the coma

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.192..641b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 192, Sept. 1980, p. 641-650.

Astronomy and Astrophysics

Astronomy

7

Astronomical Photometry, Comet Nuclei, Cosmic Dust, Emission Spectra, Meteoritic Composition, Molecular Spectra, Carbon, Cyano Compounds, Micrometeoroids, Multispectral Band Scanners, Optical Scanners, Spatial Distribution, Comets, West Comet, Photometry, Emissions, Bands, Molecules, Distribution, Dust, Cyanide, Carbon, Analysis, Spectrum, Nuclei, Particles, Data, Wavelengths, Comparisons, Flux, Energy

Scientific paper

The scale lengths of the CN and C2 molecules and their parents are derived based on Haser's model from drift scans across the coma of Comet West in the light of CN (0,0), C2 (0,0) and the continuum around 5000 Å. The analysis provides evidence to show that the CN molecules are produced by the dissociation of two species of parent molecules having entirely different lifetimes. A similar result is also obtained for the C2 molecules.
The step scans of 1976 March 19.96, covering the spectral range 3700- 5300 Å and at five independent locations inside the coma show that there is an increase of reddening of the continuum, from the centre of the nucleus outwards. These provide evidence that the coarser particles are to the centre and the finer ones towards the periphery. A study of the radial distribution of CN, C3 and C2 molecules and of the dust particles shows that the C3 (4050 Å) intensities fall most rapidly, compared to CN or C2.

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