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Stellar magnetic imaging from spectropolarimetric data

  • J.-F. Donati (a1)

Abstract

In this paper, I will review the capabilities of magnetic imaging (also called Zeeman-Doppler imaging) to reconstruct spot distributions of surface fields from sets of rotationnally modulated Zeeman signatures in circularly polarised spectral lines. I will then outline a new method to measure small amplitude magnetic signals (typically 0.1% for cool active stars) with very high accuracy. Finally, I will present and comment new magnetic images reconstructed from data collected in 1993 December at the Anglo-Australian Telescope (AAT).

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References

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Brown, S.F., Donati, J.-F., Rees, D.E. and Semel, M. (1991) A&A , 250, 463
Donati, J.-F., Semel, M. and Rees, D.E. (1992a) A&A , 265, 669
Donati, J.-F., Brown, S.F., Semel, M., Rees, D.E., Dempsey, R.C., Matthews, J.M., Henry, G.W. and Hall, D.S. (1992b) A&A , 265, 682

Stellar magnetic imaging from spectropolarimetric data

  • J.-F. Donati (a1)

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