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New Experiments with Zeeman Doppler Mapping

Published online by Cambridge University Press:  07 August 2014

Alex J. Martin ,
Stefano Bagnulo  and
Martin J. Stift
Alex J. Martin
Affiliation:
Armagh Observatory, College Hill, Armagh, BT61 9DG, United Kingdom email: [email protected] Keele University, Keele, Staffordshire, ST5 5BG, United Kingdom
Stefano Bagnulo
Affiliation:
Armagh Observatory, College Hill, Armagh, BT61 9DG, United Kingdom email: [email protected]
Martin J. Stift
Affiliation:
Universittssternwarte Wien, Türkenschanzstr. 17, A-1180 Wien, Austria
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Abstract

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We present recent experiments using a Levenberg-Marquardt algorithm and the polarised radiative transfer code COSSAM to produce a new ZDM code. Currently the code is able to recover the magnetic parameters of model stars with either a decentred dipole morphology or a morphology consisting of a centred dipole and a quadrupole, while simultaneously calculating multiple chemical abundances (including a basic stratification model). The ZDM code has been tested using both synthetic spectra and real, well studied stars. Additional features are currently being added such as a multipole morphology of arbitrary order and more sophisticated chemical stratification models.

Keywords

SNRcrosstalkAp StarsZDMpolarimetry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 300 - 301
Copyright
Copyright © International Astronomical Union 2014 

References

Amari, S., Hoppe, P., & Zinner, E., Lewis, R. S. 1995, Meteoritics, 30, 490Google Scholar
Anders, E. & Zinner, E. 1993, Meteoritics, 28, 490Google Scholar
Bernatowicz, T. J., Messenger, S., Pravdivtseva, O., Swan, P., & Walker, R. M. 2003, Geochim. Cosmochim. Acta, 67, 4679Google Scholar