Stokes parameters at location A (light bridge) in Fig. 3 for the Si i 10 827 Å line (top panels) and the Ca i 10 839 Å line (bottom panel). Thin lines correspond to the observed profiles and thick lines to the fit obtained with SIR. The wavelength Δλ = 0 refers to the line core. The physical parameters inferred from the inversion at log τ = −0.5 are v = −0.01 km s-1, B = 568 G, γ = 107°, and χ = 240°, and at log τ = −2.2 are v = −0.62 km s-1, B = 1339 G, γ = 151°, and χ = 190°.
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