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Paper: Molecular Diagnostics of the Internal Structure of Starspots and Sunspots
Volume: 358, Solar Polarization 4
Page: 375
Authors: Afram, N.; Berdyugina, S.V.; Fluri, D.M.; Solanki, S.K.; Lagg, A.; Petit, P.; Arnaud, J.
Abstract: We have analyzed the usefulness of molecules as a diagnostic tool for studying solar and stellar magnetism with the molecular Zeeman and Paschen-Back effects. In the first part we concentrate on molecules that are observed in sunspots such as MgH and TiO. We present calculated molecular line profiles obtained by assuming magnetic fields of 2–3 kG and compare these synthetic Stokes profiles with spectro-polarimetric observations in sunspots. The good agreement between the theory and observations allows us to turn our attention in the second part to starspots to gain insight into their internal structure. We investigate the temperature range in which the selected molecules can serve as indicators for magnetic fields on highly active cool stars and compare synthetic Stokes profiles with our recent observations.
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