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1 results

  • New Experiments with Zeeman Doppler Mapping

  • Alex J. Martin, Stefano Bagnulo, Martin J. Stift
  • Journal:
    Proceedings of the International Astronomical Union / Volume 9 / Issue S302 / August 2013
    Published online by Cambridge University Press:
    07 August 2014, pp. 300-301
    Print publication:
    August 2013
    • Article
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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.