Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981m%26p....25..437i&link_type=abstract
Moon and the Planets, vol. 25, Dec. 1981, p. 437-450.
Astronomy and Astrophysics
Astronomy
1
Carbon, Cyanides, Kohoutek Comet, Molecular Spectra, Optical Scanners, Spectrophotometry, Astronomical Models, Electrophotometry, Molecular Relaxation, Spectral Energy Distribution, Vibrational Spectra
Scientific paper
The vibrational temperature of C2 and the total numbers and production rates of CN and C2 are derived from fluxes observed in photoelectric spectrophotometric scans of Comet 1973 XII Kohoutek made on November 25.85 and 28.85 UT, 1973. From the variation of production rates with heliocentric distance, it is shown that there was an outburst on November 25.85 in both CN and C2 productions. For C2, the production rates are derived by using two coma models: (1) Haser's (1957) parent-daughter model, and (2) the model relevant to a proposition of Yamamoto (1981b) that C2 is formed by a two-step photodissociation of its parent molecules. One-step rather than two-step photodissociation is supported by a comparison of the production rate derived from the two models, and it is shown that the variation of the production rate with heliocentric distance is modified by comparison with that derived from the Haser model.
Ishii H. S.
Tamura Shun
Yamamoto Tadahiro
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