Table 1
Summary of ZDI inversions for τ Sco.
| Model | Parameterisation | σV | RMS field (G) | Magnetic energy | Plot | ||||
| number | of magnetic maps | × 10-5 | ⟨ Br ⟩ | ⟨ Bθ ⟩ | ⟨ Bϕ ⟩ | Total | pol:tor | ℓ<m/ 2:ℓ ≥ m/ 2 | |
|
|
|||||||||
| 1 | direct | 7.9 | 168 | 142 | 211 | 1.18 | – | – | Fig. 1a |
| 2 | harmonic, βℓ,m ≠ αℓ,m,γℓ,m ≠ 0 | 8.1 | 160 | 118 | 215 | 1.09 | 45.6:54.4 | 25.6:74.4 | Fig. 1b |
| 3 | harmonic, βℓ,m ≠ αℓ,m,γℓ,m = 0 | 8.2 | 356 | 206 | 223 | 2.76 | 100.0:0.0 | 34.3:65.7 | Fig. 2a |
| 4 | harmonic, βℓ,m = αℓ,m,γℓ,m ≠ 0 | 8.4 | 663 | 900 | 598 | 20.34 | 48.6:51.4 | 6.3:93.7 | Fig. 2b |
Notes. The columns give ZDI inversion number, assumed parameterisation of magnetic field maps, mean deviation of the fit to observed Stokes V profiles, rms values of the radial, meridional, and azimuthal field components, the total magnetic energy (in arbitrary units), and the relative energies contained in the poloidal vs. toroidal and axisymmetric vs. non-axisymmetric field components.
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