25 citations · 60 across the 11 of their papers we have counts for
12 papers
Planet-Disk Interactions and the Convective Overstability. I. Low Mass Planets
M. Lehmann, M. K. Lin
Rapid inward migration driven by Type I torques threatens the survival of low-mass planets in their nascent protoplanetary disks (PPDs). Positive co-rotation torques offer a potent…
Convective Overstability in Radially Global Protoplanetary Disks. II. Impact on planetesimal formation
Marius Lehmann, Min-Kai Lin
The Convective Overstability (COS) is a hydrodynamic instability occurring in protoplanetary disk (PPD) regions with an adverse radial entropy gradient. It is a potential driver of…
Dust dynamics in radially convective regions of protoplanetary disks
Min-Kai Lin, Marius Lehmann
Hydrodynamic instabilities likely operate in protoplanetary disks. One candidate, Convective Overstability (COS), can be triggered in regions with a negative radial entropy gradien…
Convective overstability in radially global protoplanetary disks I -- Pure gas dynamics
Marius Lehmann, Min-Kai Lin
Protoplanetary disks are prone to several hydrodynamic instabilities. One candidate, Convective Overstability (COS), can drive radial semi-convection that may influence dust dynami…
Viscous overstability in dense planetary rings -- Effect of vertical motions and dense packing
Marius Lehmann, Heikki Salo
We investigate the linear axisymmetric viscous overstability in dense planetary rings with typical values of the dynamical optical depth . We develop a granular flow…
Filament formation due to diffusive instabilities in dusty protoplanetary disks
Konstantin Gerbig, Min-Kai Lin, Marius Lehmann
We report the finding of a new, local diffusion instability in a protoplanetary disk, which can operate in a dust fluid, subject to mass diffusion, shear viscosity, and dust-gas dr…
Instabilities in dusty non-isothermal proto-planetary discs
Marius Lehmann, Min-Kai Lin
Protoplanetary discs (PPDs) can host a number of instabilities that may partake directly or indirectly in the process of planetesimal formation. These include the Vertical Shear In…
Impact of Local Pressure Enhancements on Dust Concentration inTurbulent Protoplanetary Discs
Marius Lehmann, Min-Kai Lin
We investigate the evolution of dust and gas in the vicinity of local pressure enhancements (pressure bumps) in a protoplanetary disc (PPD) with turbulence due to the Vertical Shea…
Beamforming for measurements under disturbed propagation conditions using numerically calculated Green's functions
Marius Lehmann, Daniel Ernst, Marc Schneider +2
Beamforming methods for sound source localization are usually based on free-field Green's functions to model the sound propagation between source and microphone. This assumption is…
Density Waves and the Viscous Overstability in Saturn's Rings
Marius Lehmann, Juergen Schmidt, Heikki Salo
This paper addresses resonantly forced spiral density waves in a dense planetary ring which is close to the threshold for viscous overstability. We solve numerically the hydrodynam…
Viscous Overstability in Saturn's Rings: Influence of Collective Self-gravity
Marius Lehmann, Juergen Schmidt, Heikki Salo
We investigate the influence of collective self-gravity forces on the nonlinear, large-scale evolution of the viscous overstability in Saturn's rings. We numerically solve the axis…
A Weakly Nonlinear Model for the Damping of Resonantly Forced Density Waves in Dense Planetary Rings
Marius Lehmann, Juergen Schmidt, Heikki Salo
In this paper we address the stability of resonantly forced density waves in dense planetary rings. Already by Goldreich & Tremaine (1978) it has been argued that density waves mig…