38 papers
A robust super-time-stepping scheme for Ohmic and ambipolar diffusion
Giancarlo Mattia, Mario Flock, David Melon Fuksman +3
Context. Non-ideal magnetohydrodynamics (MHD) is a key tool for modeling magnetic flux transport in astrophysical systems such as molecular clouds, protostellar cores, and protopla…
MRI-triggered instability at the inner dead zone edge: disc evolution and burst modes tied to magnetic field strengths
Michael Cecil, Mario Flock, Daniel Steiner
The inner edge of the dead zone (DZIE) in protoplanetary discs is prone to episodic instability caused by the activation of the magneto-rotational instability (MRI) in the weakly t…
Substructures Induced by Dust Drag in Protoplanetary Disks
Jiaqing Bi, Mario Flock, Dominik Ostertag +2
Dust substructures observed in protoplanetary disks are commonly attributed to embedded planets; however, intrinsic gas-dust interactions can also generate complex morphologies. We…
A Comparative Study of the Streaming Instability: Unstratified Models with Marginally Coupled Grains
Stanley A. Baronett, Wladimir Lyra, Hossam Aly +19
The streaming instability is a leading mechanism for concentrating solids and initiating planetesimal formation in protoplanetary disks. Although numerous studies have explored its…
Gas dynamics around dust asymmetries in turbulent disks
Lizxandra Flores-Rivera, Natascha Manger, Michiel Lambrechts +4
High-resolution ALMA observations have revealed asymmetric dust crescents in several protoplanetary disks, suggesting efficient dust trapping mechanisms potentially linked to gas v…
The GRAVITY young stellar object survey -- XV. The star-disk interaction region of the T Tauri star DO Tau
GRAVITY Collaboration, K. Perraut, J. Bouvier +61
Protoplanetary disks around young Sun-like stars are the cradles of the vast majority of detected exoplanets. Probing these disks at multiple spatial scales is key to uncovering ho…