4 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…
Starlight-driven flared-staircase geometry in radiation hydrodynamic models of protoplanetary disks
Prakruti Sudarshan, Mario Flock, Alexandros Ziampras +2
Protoplanetary disks observed in millimeter continuum and scattered light show a variety of substructures. Various physical processes in the disk could trigger such features -- one…
Spiral excitation in protoplanetary disks through gap-edge illumination: Distinctive kinematic signatures in CO isotopologues
Dhruv Muley, León-Alexander Hühn, Haochang Jiang +1
High-resolution, near-infrared observations have revealed prominent, two-armed spirals in a multitude of systems, such as MWC~758, SAO~206462, and V1247~Ori. Alongside the classica…
Multidimensional half-moment multigroup radiative transfer. Improving moment-based thermal models of circumstellar disks
David Melon Fuksman, Mario Flock, Hubert Klahr +2
Common moment-based radiative transfer methods, such as flux-limited diffusion (FLD) and the M1 closure, suffer from artificial interactions between crossing beams. In protoplaneta…