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Stellar magnetic imaging from spectropolarimetric data

Published online by Cambridge University Press:  25 May 2016

J.-F. Donati
J.-F. Donati*
Affiliation:
Obs. Midi-Pyrénées, 14 Av. Belin, F-31400 Toulouse, France

Abstract

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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).

Information

Type
Session I: “Stellar Surface Mapping Techniques”
Information
Symposium - International Astronomical Union , Volume 176: Stellar Surface Structure , 1996 , pp. 53 - 60
Copyright
Copyright © Kluwer 1996 

References

Brown, S.F., Donati, J.-F., Rees, D.E. and Semel, M. (1991) A&A , 250, 463 Google Scholar
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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 Google Scholar