Table 1
Magnetic field characteristics of V530 Per in 2018 and 2006 (2006 values taken from C20).
| Parameter | Value (2018) | Value (2006) | |
|---|---|---|---|
| a | ⟨B⟩ | 222 G | 177 G |
| b | |Bpeak| | 1616 G | 1088 G |
| c | Toroidal | 68% (tot) | 64% (tot) |
| d | Axisymmetric | 65%(tot) | 53% (tot) |
| e | pol axisymmetric | 36% (pol) | 16% (pol) |
| f | tor axisymmetric | 79%(tor) | 74% (tor) |
| g | Dipole | 6.3% (pol) | 1.2% (pol) |
| h | Quadrupole | 6.6% (pol) | 3.3% (pol) |
| i | Octopole | 7.3% (pol) | 5.4% (pol) |
| j | pol ℓ > 3 | 79.3% (pol) | 90.1% (pol) |
| k | tor ℓ = 1 | 2.6% (tor) | 8% (tor) |
| l | tor ℓ = 2 | 8.6%(tor) | 21% (tor) |
| m | tor ℓ = 3 | 13.7% (tor) | 20% (tor) |
| n | tor ℓ > 3 | 75.1% (tor) | 51% (tor) |
Notes. The quantities listed include (a) the average magnetic field strength ⟨B⟩, (b) the unsigned peak magnetic field strength |Bpeak|, (c) the ratio of toroidal field energy with respect to the total magnetic energy, (d) the ratio of magnetic energy in axisymmetric modes (m = 0) over the total energy, the same quantity but limited to the poloidal (e) and toroidal (f) magnetic component, the ratio of the dipole, quadrupole, octopole, and ℓ > 3 (g, h, i, j) as a fraction of the poloidal component, and (ℓ = 1, 2, 3, > 3) subcomponents of the toroidal field energy, as a fraction of the toroidal field energy (k, l, m, and n). Abbreviations: tot = total, pol = poloidal, tor = toroidal.
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