Abundance differences between HD106515 B and A caused by planet formation taking place only around star A. The top shows the case of the planet forming where it is observed today at 4.5 AU, which lies outside the water ice line, while the bottom considers the planet forming inside the water ice line, just outside . The gray area delimited by black lines corresponds to the measurements including the 1σ error (Liu et al. 2021). In blue, the disks around the constituents are parameterized by α = 1 × 10⁻³, u_frag = 10 m s⁻¹. The red and green lines describe disks with a viscosity of α = 1 × 10⁻⁴ with u_frag = 1 m s⁻¹ and u_frag = 10 m s⁻¹, respectively.