Vega observations with SOPHIE/OHP in 2012 and 2018. Upper panels: dynamical spectra of 2012 and 2018. Phase zero corresponds for the 2018 dataset to BJD = 2456892.015. For the 2012 dataset, we opted for BJD = 2456142.332. The two inner blue lines symmetric to zero velocity correspond to ± v sin i = 21.6 km s⁻¹, while the outer dashed blue lines include the zone where Gaussian broadening widens the line profile. Lower panels: reconstructed surface map of Vega in Mollweide projection, based on the procedure described in Sect. 4.2. Left: map of 2012. Right: map of 2018. Overall, 80% of the highest S/N files were kept for map building.