Table 2
Detection limits for the best sampling of Set 1 and Set 2 for selected conditions and a planet at 1.2 AU.
| Correction | Ca | Specific | Set 1, corr | Set 2, corr | Set 1, LPA | Set 2, LPA |
| method | conditions | MEarth | MEarth | MEarth | MEarth | |
|
|
||||||
| No | – | RVsppl | 0.3 | 0.4 | 0.2 | 0.4 |
| No | – | RVtot | 6.8 | 11.4 | 15.7 | 17.1 |
|
|
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| No | – | RVtot, conv x 2 | 13.4 | 22.6 | 31.4 | 33.7 |
| No | – | RVtot, conv/2 | 3.6 | 5.8 | 7.9 | 8.7 |
| No | – | RVtot, conv/5 | 1.6 | 2.4 | 3.2 | 3.8 |
| No | – | RVtot, conv/10 | 1.0 | 1.3 | 1.7 | 2.1 |
|
|
||||||
| Sin. fit | Obs. | – | – | 2.6 | – | 5.9 |
| Sin. fit | Sim., no noise | – | 2.3 | 2.4 | 4.6 | 5.8 |
| Sin. fit | Sim., high S/N | – | 2.3−2.3 (2.3) | 2.4−2.5 (2.4) | 4.6−4.7 (4.6) | 5.8−5.9 (5.8) |
| Sin. fit | Sim., medium S/N | – | 2.2−2.5 (2.3) | 2.3−2.6 (2.4) | 4.5−4.7 (4.6) | 5.7−6.0 (5.8) |
| Sin. fit | Sim., low S/N | – | 2.0−3.3 (2.4) | 1.4−12.8 (3.8) | 4.5−5.0 (4.8) | 5.9−19.1 (8.1) |
|
|
||||||
| RV-Ca | Obs. | – | – | 2.7 | – | 4.0 |
|
|
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| RV-Ca | Sim., no noise | – | 0.7 | 0.5 | 0.3 | 0.5 |
| RV-Ca | Sim., high S/N | – | 0.6−1.6 (1.0) | 0.6−1.8 (1.2) | 0.6−1.1 (0.8) | 0.8−1.4 (1.1) |
| RV-Ca | Sim., medium S/N | – | 1.4−3.1 (2.0) | 0.8−4.6 (3.2) | 3.2−4.5 (3.7) | 3.0−4.5 (4.1) |
| RV-Ca | Sim., low S/N | – | 5.1−6.8 (6.0) | 7.7−11.3 (10.1) | 13.2−14.5 (13.7) | 13.7−15.9 (15.0) |
|
|
||||||
| RV-Ca | Sim., no noise | conv x 2 | 1.3 | 1.0 | 0.8 | 0.8 |
| RV-Ca | Sim., no noise | conv/2 | 0.4 | 0.3 | 0.3 | 0.4 |
| RV-Ca | Sim., no noise | conv/5 | 0.3 | 0.3 | 0.3 | 0.4 |
| RV-Ca | Sim., no noise | conv/10 | 0.3 | 0.4 | 0.3 | 0.4 |
|
|
||||||
| RV-Ca | Sim., med S/N | conv x 2 | 2.5−6.0 (3.8) | 1.6−9.1 (6.24) | 6.2−8.8 (7.3) | 5.7−9.7 (8.0) |
| RV-Ca | Sim., med S/N | conv/2 | 0.8−1.7 (1.2) | 0.4−2.3 (1.7) | 1.6−2.3 (1.9) | 1.7−2.7 (2.3) |
| RV-Ca | Sim., med S/N | conv/5 | 0.5−0.8 (0.6) | 0.3−1.1 (0.8) | 0.7−1.0 (0.8) | 0.9−1.3 (1.2) |
| RV-Ca | Sim., med S/N | conv/10 | 0.4−0.6 (0.5) | 0.3−0.7 (0.5) | 0.4−0.5 (0.4) | 0.6−0.9 (0.8) |
|
|
||||||
| RV-Ca | Sim., no noise | planet 1 MEarth, 480d | 2.6 | 3.8 | 1.2 | 1.8 |
| RV-Ca | Sim., no noise | planet 2 MEarth, 480d | 4.6 | 6.0 | 2.2 | 2.8 |
| RV-Ca | Sim., no noise | planet 5 MEarth, 480d | 12.3 | 13.5 | 5.3 | 5.8 |
| RV-Ca | Sim., no noise | planet 10 MEarth, 480d | 33.0 | 30.5 | 10.3 | 10.7 |
|
|
||||||
| RV-Ca | Sim., no noise | planet 1 MEarth, 200d | 0.4 | − | 0.5 | − |
| RV-Ca | Sim., no noise | planet 2 MEarth, 200d | 0.7 | − | 0.8 | − |
| RV-Ca | Sim., no noise | planet 5 MEarth, 200d | 2.1 | − | 2.3 | − |
| RV-Ca | Sim., no noise | planet 10 MEarth, 200d | 4.6 | − | 5.0 | − |
Notes.RVsppl and RVtot represent respectively the best conditions (no convection) and the present one (observed level of convection): hence, the associated detection limits correspond respectively to our objective and the starting point. The “Sin. fit” correction stands for sinusoidal fit correction (Sect. 4.1), RV-Ca correction for the correction method using the correlation between Ca and RV (Sect. 4.2). All results are for no RV noise. A range indicates the minimum and maximum detection limits for ten realisations of the Ca noise and the value between parentheses the average over the ten values. The detection limits equal to or lower than 1 MEarth are indicated in bold.
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