Table 3
Comparison of the dispersion in real RVs, rmsdata, with the synthetic data dispersions for all type of noise, rmssyn, tot, and for each type of noise individually.
| Star | rmsdata | rmssyn, tot | rmssyn, SG | rmssyn, MG | rmssyn, G | rmssyn, p−modes | rmssyn, const. | rmshigh frequency |
| [m s-1] | [m s-1] | [m s-1] | [m s-1] | [m s-1] | [m s-1] | [m s-1] | [m s-1] | |
|
|
||||||||
| β Hyi | 2.60 | 2.88 | 0.55 | 1.05 | 1.26 | 2.23 | 0.94 | – |
| μ Ara | 1.97 | 1.90 | 0.56 | 1.05 | 0.46 | 1.11 | 1.00 | 1.08 |
| α Cen A | 2.03 | 1.89 | 0.77 | 0.62 | 0.40 | 1.20 | 0.99 | 1.1 |
| τ Ceti | 1.47 | 1.42 | 0.85 | 0.43 | 0.34 | 0.52 | 0.87 | 0.96 |
| α Cen B | 0.9 | 0.88 | 0.15 | 0.48 | 0.32 | 0.39 | 0.52 | 0.52 |
Notes. SG = supergranulation, MG = mesogranulation, G = granulation, const. = instrumental and photon noise. The dispersion in synthetic measurement is calculated during 100 consecutive days, with one measurement per night of 15 min. rmshigh frequency corresponds to the noise calculated in the power spectrum at high frequency, after p-modes.
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