Looking for exoplanets using radial velocities, it appears that we are nowadays reaching a sensitivity limit around 1m/s. This is mainly due to stellar activity which generates spurious radial velocity (RV) signals that can add noise limiting our detection capabilities.
In this context, my talk will attempt to find links between the physical processes at play on the highly active M dwarf EV-Lac, and its measured RV. To this end, I am using combined optical and near-infrared measurements obtained respectively with SOPHIE and SPIRou. This allows to study how different lines react to different activity processes along this complete spectral range.
More specifically, I will show how a line-by-line approach enables us to compute different RV that can trace specific activity-related processes.
| Type : | : | Orale |
| Thématiques | : | Thème 3 : Etoiles comme hôtes |
| PDF version | : |  PDF version |
