Cool Stars 14 - Submitted Abstract # 63
This version created on 05 October 2006

Modeling molecular polarization from starspots


Nadine Afram, ETH Zurich
Svetlana Berdyugina, ETH Zurich
Dominique Fluri, ETH Zurich
Felix Suwald, ETH Zurich
Jeff Kuhn, University of Hawaii
Dave Harrington, University of Hawaii

For cool stars with magnetic activity we have analyzed the usefulness
of molecules as a diagnostic tool for direct measurement of magnetic
fields with the molecular Zeeman and Paschen-Back effects in spatially
unresolved starspots.  We present calculated molecular line profiles
for MgH, TiO, CaH, and FeH to investigate the temperature range in
which the selected molecules can serve as indicators for magnetic
fields.  In a next step we compare the synthetic Stokes profiles with
our recent observations (ESpADOnS, CFHT) of G-K-M stars with surface
magnetic fields producing LSD Stokes V signals in atomic lines and
circular polarization in some molecular lines.

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