Table 1
Summary of the different methods used to determine νmax and ⟨ Δν ⟩ .
| ID | COR | CAN | A2Z | SYD | DLB | OCT |
|
|
||||||
| ν max | centroid Gaussian | centroid Gaussian | centroid Gaussian | peak smoothed PS | centroid Gaussian | centroid Gaussian (I) |
| first moment (II) | ||||||
| smoothing | 3Δν Gauss | none | 4Δν box | 2Δν Gauss | 10 μHz Gauss | 2Δν box |
| Δν | autocor timeseries | fit to PS | PS ⊗ PS | autocor PS | autocor PS | PS ⊗ PS |
| freq interval | FWHM osc excess | 3 radial orders | νmax ± νmax/3 | νmax ± 5–7Δν | νmax ± νmax/4 | osc excess |
| background | a ν −β |
|
|
|
|
linear approx |
| Eq. (2) | yes | no | yes | yes | yes | yes |
Notes. We also mention the way the smoothing is applied to the power spectrum in the determination of νmax, the frequency interval over which ⟨ Δν ⟩ is computed, how the background is determined and whether Eq. (2) is used. For the background we indicate the general formulae with w indicating white noise, ν frequency, and a,B,C,α and β free parameters.
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