Journal of Astrophysics and Astronomy

, Volume 1, Issue 2, pp 97–100 | Cite as

Comments on the source function equality in (Zeeman)-multiplets

  • L. G. Stenholm
  • R. Wehrse


The conditions for the source functions of a multiplet to be equal are studied for plasmas with and without magnetic fields. It is found that source function equality holds—in addition to the case of collisional predominance—only when the redistribution functions are all identical and no interlocking with other lines occurs. When magnetic fields are present, the assumption of source function equality leads to a violation of the invariance conditions of the scattering matrix and should therefore not be made.

Key words

radiative transfer—non-LTE—Zeeman effect—polarization 


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Copyright information

© Indian Academy of Sciences 1980

Authors and Affiliations

  • L. G. Stenholm
    • 1
  • R. Wehrse
    • 1
  1. 1.Institut für Theoretische AstrophysikHeidelbergGermany

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