Online material

Appendix A: Online figures

We present additional figures illustrating our OC results in this appendix.

A.1. Additional one-component fit results

Figure A.1 shows the OC fit results not presented in the main article body whose corresponding χ²-plots were included in Fig. 3. The best-fit models drawn are mentioned in the respective captions of the sub-figures.

	Fig. A.1 Additional comparison of overall best-fit results from one-component inversions with non-magnetic models and 3σ upper limits, respectively.
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A.2. Free fit parameters

Figure A.2 shows the behavior of the free fit parameters with Bf in the OC inversions. Red error bars indicate formal singular value decomposition (SVD) errors obtained from SPINOR. They also indicate the spacing of the Bf grid scanned, thereby illustrating the higher sampling close to . Generally, fit parameters behave smoothly, apart from regions where small numerical jumps are visible, such as for vsini in Fig. A.2a. The center panel in each sub-figure labeled v_turb contains both macro- and microturbulent velocities, with macroturbulence generally stronger than microturbulence. Degeneracy of fit parameters is evident from the combined reaction of the parameter set caused by the fixed values of Bf.

	Fig. A.2 Behavior of best-fit parameters with Bf using one-component models. Plot organized the same way as Fig. 3. vturb indicates micro- and macroturbulent velocities, with macroturbulence usually larger than microturbulence.
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© ESO, 2010