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Description of anomalous Zeeman patterns in stellar astrophysics

  • J.-C. Pain (a1) and F. Gilleron (a1)

Abstract

The influence of a magnetic field on the broadening of spectral lines and transition arrays in complex spectra is investigated. The anomalous absorption or emission Zeeman pattern is a superposition of many profiles with different relative strengths, shifts, widths, asymmetries and sharpnesses. The σ and π profiles can be described statistically, using the moments of the Zeeman components. We present two statistical modellings: the first one provides a diagnostic of the magnetic field and the second one can be used to include the effect of a magnetic field on simulated atomic spectra in an approximate way.

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References

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[1]Alecian, G., & Stift, M.J., 2002, A&A, 387 , 271
[2]Zeeman, P., 1897, ApJ, 5 , 332
[3]Donati, J.-F., & Cameron, A.C., 1997, Mon. Notes R. Astron. Soc., 291 , 1
[4]Godbert-Mouret, L., et al., 2009, High Energy Density Phys., 5 , 162
[5]Mathys, G., & Stenflo, J.O., 1987, A&A, 171 , 368
[6] Kendall, M.G., & Stuart, A., 1969, Advanced Theory of Statistics (Hafner, New York)
[7]Pain, J.-Ch., et al., 2009, High Energy Density Phys., 5 , 294
[8] Landi Degl’Innocenti, E., 1985, Solar Phys., 99 , 1
[9]Bauche, J., & Oreg, J., 1988, J. Phys. Colloques C1, 49 , 263
[10]Gilleron, F., & Pain, J.-C., 2009, High Energy Density Phys., 5 , 320

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