Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-12T20:02:30.521Z Has data issue: false hasContentIssue false
  • English
  • Français

A Search for Molecular Transitions in the 22-25 GHz Band in Comet Kohoutek 1973f

Published online by Cambridge University Press:  22 February 2018

E. Churchwell ,
T Landecker ,
G. Winnewisser ,
R. Hills  and
J. Rahe

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

According to current theories, the radicals optically identified in cometary spectra stem from more complex parent compounds which have no transitions at visible wavelengths. In recent years radio transitions of likely molecules have repeatedly been searched for but were never found (e.g., Huebner and Snyder, 1970; Clark et al., 1971). Only in Comet Kohoutek 1973f have microwave lines of three molecules been detected, OH (Biraud et al., 1974; Turner, 1974), CH3CN (Ulich and Conklin, 1974), and HCN (Snyder et al., 1974). Here we report on our search for transitions in the 22-25 GHz band of the molecules H2O, NH3, and CH3OH in this Comet and give upper limits on line temperatures and column densities.

Type
Part I
Information
International Astronomical Union Colloquium , Volume 25 , Issue Part1: The Study of Comets , 1976 , pp. 281 - 286
Copyright
Copyright © NASA 1976

References

Biraud, F., Bourgois, G., Crovisier, J., Fillit, R., Gerard, E., and Kazes, I., 1974, Astron. and Ap. 34, 163.Google Scholar
Clark, T. A., Donn, B., Jackson, W. M., Sullivan, W. T. III, and Vandenberg, N. 1971, A. J., 76, 614.Google Scholar
Huebner, W.F., and Snyder, L. E. 1970, A. J., 75, 759.Google Scholar
Huebner, W.F., Snyder, L. E., and Buhl, D. 1974, Icarus 23, 580.Google Scholar
Turner, B.E., 1974, Ap. J. (Letters), 189, L137.Google Scholar
Ulich, B. L., and Conklin, E. K., 1974, Nature, 248, 121.Google Scholar