Hostname: page-component-77c89778f8-rkxrd Total loading time: 0 Render date: 2024-07-16T23:06:39.887Z Has data issue: false hasContentIssue false
  • English
  • Français

Diffusion in Stellar Envelopes

Published online by Cambridge University Press:  14 August 2015

M.J. Seaton
M.J. Seaton*
Affiliation:
Department of Physics and Astronomy, University College London, Gower St., London WC1E 6BT

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.

In an attempt to make the present summary comprehensible yet sufficiently concise I will risk some over-simplification: further details are given in Seaton (1997, 1998 — Papers I and II).

In a star let Fv dv be the outward flux of radiant and let an atom of element k present an effective area of σv(k) for absorption of radiation. Then the momentum absorbed per atom and per-unit area and unit time is G(k) = (1/c) ∫ Fvσv(k) dv which is just the force acting on the atom. The radiative acceleration is grad(k) = G(k)/M(k) where M(k) is the atom’s mass.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 2: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part B), 1997 , 1998 , pp. 664 - 666
Copyright
Copyright © Kluwer 1998

References

Aller, L.H. and Chapman, S., 1960, ApJ, 132, 461 CrossRefGoogle Scholar
Babel, J., 1995, A&A, 301, 823 Google Scholar
Babel, J., 1996, A&A, 309, 867 Google Scholar
Michaud, G., 1970, ApJ, 160, 641 Google Scholar
Rogers, F.J., and Iglesias, C.A., 1992, ApJS, 79, 507 Google Scholar
Seaton, M.J., 1997, MNRAS, 289, 700 Google Scholar
Seaton, M.J., 1998, MNRAS, to be submittedGoogle Scholar
Seaton, M.J. Yan, Yu Mihalas, D. and Pradhan, A.K., 1994, MNRAS, 266, 805 Google Scholar
The Opacity Project Team, 1995, “The Opacity Project”, Vol. 1, Institute oif Physics, Bristol Google Scholar