Comparison of the V atmospheric model of WASP-76b (cyan) and MASCARA-1b (violet) computed with petitRADTRANS assuming their equilibrium temperatures and a volume mixing ratio of 10⁻⁵. In the vertical axis, we show (R_λ/R_*)² with the continuum (R_p/R_*)² subtracted, in units of ppm, for a better comparison of the lines strength. Both models are shown at the ESPRESSO resolution (ℜ = 140000) and consider a planet tidally locked rotation of υ_rot = 5.3 km s⁻¹ and υ_rot = 3.9 km s⁻¹ for WASP-76b and MASCARA-1b, respectively.