Rings and gaps have been observed in a wide range of proto-planetary discs, from young systems like HLTau to older discs like TW Hydra. Recent disc simulations have shown that magnetohydrodynamic (MHD) turbulence (in both the ideal or non-ideal regime) can lead to the formation of rings and be an alternative to the embedded planets scenario. In this talk, I will investigate the way in which...
Observations of structures in discs such as gaps and kinks give us a tantalising glimpse of possible planets forming there. Recent numerical simulations show that planets that are misaligned with respect to the protoplanetary disc may cause the disc to warp and even break into distinct planes. These effects occur even with small misalignments and are therefore likely to be reasonably common....
I try to explain the primordial origin of misalignment between the disk rotation and host star’s rotation from the context of the disk formation. Theoretical and observational investigations have provided convincing evidence for the formation of molecular cloud cores by the gravitational fragmentation of filamentary molecular clouds, which has important implication for the origin of the...
The large scale crescent shape structures detected in protoplanetary disks have sometimes been interpreted as vortices. Vortices are of particular interest to understand planet formation as they are known to concentrate dust and could participate to planetesimal formation. We study the multiple fingerprints of such large Rossby vortices and propose observational predictions to test the if...
Snow-lines are regions of protoplanetary discs where volatiles transition from the solid-phase to the gas phase. They play an important role in the chemical evolution of protoplanetary discs and perhaps planet/planetesimal formation. The majority of work treats these transitions as passive, uncoupled from the dynamics. I will argue that snow-lines in the outer regions of protoplanetary discs...
Protoplanetary disks (PPD) have been widely observed around young stars and are supposed to host planetary formation. Among these disks stand the transition disks (TD) which are characterized by a large hole in the central regions, whose formation remains yet unexplained. Despite this hole, accretion rates comparable to the ones found in PPD are measured, suggesting an inward motion of...
