Stellar irradiated discs and implications on migration of embedded planets III: viscosity transitions

  title={Stellar irradiated discs and implications on migration of embedded planets III: viscosity transitions},
  author={Bertram Bitsch and Alessandro Morbidelli and Elena Lega and Kathrine Kretke and Aur{\'e}lien Crida},
  journal={arXiv: Earth and Planetary Astrophysics},
The migration strength and direction of embedded low-mass planets depends on the disc structure. In discs with an efficient radiative transport, the migration can be directed outwards for planets with more than 3-5 Earth masses. This is due to the entropy driven corotation torque, a process that extends the lifetimes of growing planetary embryos. We investigate the influence on the disc structure caused by a jump in the alpha parameter of the viscosity to model a dead-zone structure in the disc… 
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