Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-12-02T20:42:23.071Z Has data issue: false hasContentIssue false
  • English
  • Français

Computation of the Absorption Coefficient for Diatomic Molecules

Published online by Cambridge University Press:  12 April 2016

Mats Larsson
Mats Larsson*
Affiliation:
Physics Department I, The Royal Institute of Technology, S-100 44 Stockholm, Sweden

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.

Molecules in stellar atmospheres play key roles, not only as promoters of our understanding of stars, but also as actors affecting the structures of the atmospheres. In particular cool star atmospheres are affected by molecular opacities, and during recent years it has become clear that also weak molecular lines are of crucial structural importance. Extensive molecular data are thus needed in order to correctly model the structure of a stellar atmosphere and the transport of radiation through it. The basis for how such molecular data are acquired constitutes the theme of the present article. As will follow below, results from different subfields of molecular physics are needed in order to obtain a complete picture of the absorption of radiation by molecules. This article will only consider allowed molecular electronic transitions, i.e. dipole transitions between different electronic states; however, the presentation and the formulae may easily be modified to be valid for transitions between levels within a single electronic state.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 146: Molecules in the Stellar Environment , 1994 , pp. 271 - 281
Copyright
Copyright © Springer-Verlag 1994

References

Bauschlicher, C.W., Langhoff, S.R., 1987, J. Chem. Phys., 87, 4665 Google Scholar
Bauschlicher, C.W., Langhonff, S.R., Taylor, P.R., 1988, Astrophys. J., 332, 531 Google Scholar
Chackerian, Jr. C., Tipping, R.H., 1983, J. Mol. Spectrosc, 99, 431 Google Scholar
Condon, U., Shortley, G.H., 1935, The Theory of Atomic Spectra, Cambridge Univ. Press, London Google Scholar
Davis, S.P., Shortenhaus, D., Stark, G., Engleman, Jr. R., Phillips, J.G., Hubbard, R.P., 1986, Astrophys. J., 303, 892, ibid. 307, 414 Google Scholar
Hougen, J.T., 1970, Nati. Bur. Std. Monogr., 115 Google Scholar
Jarmain, W.R., 1971, J. Quant. Spectrosc. Radiât. Tranfer, 11, 421 CrossRefGoogle Scholar
Jarmain, W.R., McCallum, J.C., 1971, Program TRAPRB Handbook CRESS York University, Toronto, Ontario Google Scholar
Jørgensen, U.G., 1992, Revista Mexicana de Astronomia y Astrofisica, 23, 49 Google Scholar
Jørgensen, U.G., Larsson, M., 1990, Astron. Astrophys., 238, 424 Google Scholar
Kurucz, R.L., 1991, in Stellar Atmospheres, Beyond Classical Models, eds Crivellari et al., NATO ASI, Kluwer, Dordrecht Google Scholar
Kovacs, I., 1969, Rotational Structure in the Spectra of Diatomic Molecules, Hilger, London Google Scholar
Knowles, P. J., Werner, H.-J., Hay, P. J., Cartwright, D.C., 1988, J. Chem. Phys., 89, 7334 Google Scholar
Larsson, M., 1983, Astron. Astrophys., 128, 291 Google Scholar
Larsson, M., Siegbahn, P.E.M., 1983, J. Chem. Phys., 79, 2270 CrossRefGoogle Scholar
Larsson, M., Siegbahn, P.E.M., Ågren, H.A., 1983, Astrophys. J., 272, 369 Google Scholar
Lefebvre-Brion, H., Field, R.W., 1986, Perturbations in the Spectra of Diatomic Molecules, Academic, Florida Google Scholar
Lu, R., Huang, Y., Halpern, J.B., 1992, Astrophys. J., 395, 710 Google Scholar
Pineiro, A.L., Tipping, R.H., Chackerian, Jr. C., 1987a, J. Mol. Spectrosc, 125, 91 CrossRefGoogle Scholar
Pineiro, A.L., Tipping, R.H., Chackerian, Jr. C., 1987b, J. Mol. Spectrosc, 125, 184 Google Scholar
Sauvai, A.J., Tatum, J.B., 1984, Astrophys. J. Suppl., 56, 193 Google Scholar
Schadee, A., 1971, Astron. Astrophys., 14, 401 Google Scholar
Taherian, M.R., Slanger, T.G., 1984, J. Chem. Phys., 81, 3814 Google Scholar
Tatum, J.B., 1966, Publ. Dominion Astrophys. Obs., 13, No. 1Google Scholar
Tatum, J.B., 1967, Astrophys. J. Suppl., 14, 21 Google Scholar
Tipping, R.H., Chackerian, C. Jr., 1981, J. Mol. Spectrosc., 88, 352 Google Scholar
Veseth, L., 1986, Symmetries and Rotational Line Intensities in Diatomic Molecules, Report 86-05, Institute of Physics, University of Oslo, Oslo Google Scholar
Whiting, E.E., 1972, Ph.D. Thesis, York University, Toronto, Ontario Google Scholar
Whiting, E.E., 1973, Computer Program for Determining Rotational Line Intensity Factors for Diatomic Molecules, NASA TN D-7268Google Scholar
Whiting, E.E., Nicholls, R.W., 1974, Astrophys. J. Supp., 27, 1 Google Scholar
Whiting, E.E., Schadee, A., Tatum, J.B., Hougen, J.T., Nicholls, R.W., 1980, J. Mol. Spec, 80, 249 Google Scholar