Hostname: page-component-77c89778f8-fv566 Total loading time: 0 Render date: 2024-07-24T17:27:21.574Z Has data issue: false hasContentIssue false
  • English
  • Français

Isotope Ratios in Interstellar Formaldehyde

Published online by Cambridge University Press:  14 August 2015

Marc L. Kutner ,
Dennis E. Machnik ,
Kenneth D. Tucker  and
William Massano
Marc L. Kutner
Affiliation:
Physics Dept., Rensselaer Polytechnic Institute
Dennis E. Machnik
Affiliation:
Physics Dept., Rensselaer Polytechnic Institute
Kenneth D. Tucker
Affiliation:
Physics Dept., Fordham University
William Massano
Affiliation:
Physics Dept., Fordham University

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.

Formaldehyde is an excellent molecule for studying isotopic abundances. It is easily observed in several connected transitions, allowing an analysis of excitation differences among species. With formaldehyde, one can also measure the same ratio using millimeter emission lines and centimeter absorption lines, which can often be interpreted more directly. A comparison of the results from the millimeter and centimeter lines can give an idea of the uncertainties in the analysis of millimeter emission lines.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 87: Interstellar Molecules , 1980 , pp. 409 - 410
Copyright
Copyright © Reidel 1980 

References

Gardner, F. F., Ribes, J.C., and Cooper, B.F.C.: 1971, Ap. Letters, 9, p. 81.Google Scholar
Guélin, M., and Thaddeus, P.: 1979, Ap. J. (Letters), 227, p. L139.Google Scholar
Henkel, C., Walmsley, C.M., and Wilson, T.L.: 1979a, (preprint).Google Scholar
Henkel, C., Wilson, T.L., and Downes, D.: 1979b, Astron. & Ap. 73, p. L13.Google Scholar
Kutner, M.L., Evans, N.J. II, and Tucker, K.D.: 1976, Ap. J. 209, p. 452.CrossRefGoogle Scholar
Langer, W.D., Wilson, R.W., Henry, P.S., and Guélin, M.: 1978, Ap. J. (Letters) 225, p. L139.Google Scholar
Tucker, K.D., Kutner, M.L., and Massano, W.: 1979, Ap. J. (Letters) 227, p. L143.CrossRefGoogle Scholar
Wannier, P.G., Penzias, A.A., Linke, R.A., and Wilson, R.W.: 1976, Ap. J. 204, p. 26.CrossRefGoogle Scholar