Matteo Cantiello edited Discussion.tex  about 9 years ago

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\section{Discussion}  The striking agreement between the theoretical expectations for the $\ell=1$ modes visibility and the observations of \citet{Mosser_2011} conclusively shows that the energy sink for the suppressed dipole modes is in the core (see Fig.~\ref{fig:moneyplot}). This proves that all the waves leaking into the core through the evanescent region never couple back to the envelope modes. We have shown that the magnetic greenhouse effect can provide such maximally efficient trapping, thanks to the symmetry braking enforced by any plausible geometry of a (strong enough) magnetic field.  While it is possible that other symmetry breaking mechanisms could play a similar role to the magnetic greenhouse effect, we believe this is an unlikely explanation for the bulk of the suppressed dipoles sample (Details in the supplementary material). This is because the core rotation rate required to modify the incoming waves such that they will be trapped in the core is two orders of magnitude higher than the values commonly observed in these stars \citep{Beck_2011,Mosser_2012}. Moreover the magnetic greenhouse effect makes a clear prediction: that for stars with frequency of maximum power similar to the critical magneto gravity frequency $\nu_{\rm c}$, dipole modes with $\nu >\nu_{\rm c}$ will be unaffected, while those with $\nu <\nu_{\rm c}$ should show suppression. The early subgiant star KIC 8561221 displays this exact behavior \citep{Garcia_2014}, establishing demonstrating  the reality of the magnetic greenhouse effect.