Table 3
Constants describing the scaling function of measurement precision in RV and vsini as a function of S/N and vsini (see Eqs. (2) and (4)).
| Characteristics of order-sorting filter | |||
| Filter | HR10 | HR15N | HR21 |
| Mean λ (Å) | 5470 | 6630 | 8728 |
| Resolution | 19 800 | 17 000 | 16 200 |
| Range λ (Å) | 270 | 370 | 504 |
|
|
|||
| Parameters defining the scaling function SRV (Eq. (3)) | |||
| A (km s-1) | 0.22 ± 0.02 | 0.25 ± 0.02 | 0.26 ± 0.02 |
| C (km s-1) | 13.6 | 15.8 | 16.6 |
|
|
|||
| Average value of B for the mix of stars analysed in this paper | |||
| B (km s-1) | 2.3 | 5.0 | 7.1 |
| Variation of B with template temperature (Sect. 4.1) | |||
| B (3200–4000 K) | 1.8 ± 0.2 | 3.9 ± 0.1 | 7.3 ± 0.2 |
| B (4000–4800 K) | 1.7 ± 0.1 | 4.4 ± 0.2 | 6.8 ± 0.2 |
| B (4800–5600 K) | 2.4 ± 0.1 | 4.9 ± 0.1 | 6.8 ± 0.1 |
| B (5600–6400 K) | 3.5 ± 0.2 | 7.8 ± 0.3 | 7.8 ± 0.2 |
| B (6400–7200 K) | 5.1 ± 0.6 | 10.3 ± 1.1 | 9.2 ± 1.0 |
|
|
|||
| Parameters defining the scaling function Svsini (Eq. (4)) | |||
| α | – | 0.047 ± 0.005 | – |
| C (km s-1) | – | 15.8 | – |
|
|
|||
| Average value of β for the mix of stars analysed in this paper | |||
| β | 0.63 | ||
| Variation of β with template temperature (Sect. 4.4) | |||
| β (3200–4000 K) | – | 0.51 ± 0.02 | – |
| β (4000–4800 K) | – | 0.60 ± 0.04 | – |
| β (4800–5600 K) | – | 0.69 ± 0.08 | – |
| β (5600–6400 K) | – | 0.80 ± 0.06 | – |
| β (6400–7200 K) | – | 1.22 ± 0.15 | – |
Notes. Where C is calculated from Eq. (4) assuming a limb darkening coefficient u = 0.6 (Claret Diaz-Cordoves & Gimenez 1995).