Flux ratio of C2 Swan bands in the innermost atmosphere of comet Halley

Details Flux ratio of C2 Swan bands in the innermost atmosphere of comet Halley Flux ratio of C2 Swan bands in the innermost atmosphere of comet Halley

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.333..435v&link_type=abstract

Nature (ISSN 0028-0836), vol. 333, June 2, 1988, p. 435, 436.

Astronomy and Astrophysics

Astronomy

6

Astronomical Spectroscopy, Carbon, Cometary Atmospheres, Halley'S Comet, Satellite-Borne Instruments, Vega Project, Atomic Structure, Spatial Resolution, Comets, Halley, Flux, Carbon, Atmosphere, Spectrophotometry, Distance, Spacecraft Observations, Vega 2 Mission, Comet Nuclei, Tks Instrument, Dissociation, Chemistry, Distribution

Scientific paper

The spectrophotometry of comet Halley performed by the three-channel spectrometer (TKS) aboard the Vega 2 spacecraft provides spectrometric data with an unprecedentedly high angular and spatial resolution. Here, observations of the flux-ratio variation of the C2 Swan band sequence as it varies with distance from the comet nucleus are reported. The flux in the C2 (Delta = +1) band relative to C2 (Delta= 0) increases toward the nucleus by at least a factor 1.6. Such an effect may be crucial for testing current theories of the resonance fluorescence radiation of the cometary C2 molecule.

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