Opacity

  • Rudolf Kippenhahn
  • Alfred Weigert
  • Achim Weiss
Chapter
Part of the Astronomy and Astrophysics Library book series (AAL)

Abstract

In this chapter we deal with the material function κ(\(\varrho \), T ). While for the equation of state it was possible to use certain approximations (for instance, that of a perfect gas) without introducing too much error, this is almost impossible for the opacity. Although there are similar approximations (such as those for electron scattering or free–free transitions) they never hold for the whole star and are used only in simplifying approaches. Therefore nowadays, when solving the stellar-structure equations, one uses numerical opacity tables for different chemical mixtures, which give κ(\(\varrho \), T ) in the full range of \(\varrho \) and T.

Keywords

Electron Scattering Free Transition Chemical Mixture Neutral Hydrogen Atom Gaunt Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Alexander, D.R., Ferguson, J.W. (1994): Astrophys. J. 437, 879ADSCrossRefGoogle Scholar
  2. Ferguson, J.W., Alexander, D.R., Allard, F., Barman, T., Bodnarik, J.G., Hauschildt, P.H., Heffner-Wong, A., Tamanai, A. (2005): Astrophys. J. 623, 585ADSCrossRefGoogle Scholar
  3. Hubbard, W.B., Lampe, M. (1969): Astrophys. J. Suppl. 18, 297ADSCrossRefGoogle Scholar
  4. Iglesias, C.A., Rogers, F.J. (1996): Astrophys. J. 464, 943ADSCrossRefGoogle Scholar
  5. Itoh, N., Mitake, S., Iyetomi, H., Ichimaru, S. (1983): Astrophys. J. 273, 774ADSCrossRefGoogle Scholar
  6. Mendoza, C., Seaton, M.J., Buerger, P., Bellorn, A., Melndez, M., Gonzlez, J., Rodrguez, L.S., Delahaye, F., Palacios, E., Pradhan, A.K., Zeippen, C.J. (2007): Mon. Not. R. Astron. Soc. 378, 1031Google Scholar
  7. Potekhin, A.Y., Baiko, D.A., Haensel, P., Yakolev, D.G. (1999): Astron. Astrophys. 346, 345ADSGoogle Scholar
  8. Rogers, F.J., Iglesias, C.A. (1992): Astrophys. J. Suppl. Ser. 79, 507ADSCrossRefGoogle Scholar
  9. Weiss, A., Hillebrandt, W., Thomas, H.-C., Ritter, H. (2004) Cox & Giuli’s Principles of Stellar Structure, second edition (Cambridge Scientific Publishers, Cambridge)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Rudolf Kippenhahn
    • 1
  • Alfred Weigert
    • 2
  • Achim Weiss
    • 3
  1. 1.GöttingenGermany
  2. 2.Universität HamburgHamburgGermany
  3. 3.Max-Planck-Institut für AstrophysikGarchingGermany

Personalised recommendations