On corrugation mode radial wavelengths of the vertical shear instability

• DOI: 10.1093/mnras/stae619
• Publication Date: 2024-03-01T06:15:46Z
• Authors: Yixuan Dang; Can Cui; Marcelo Barraza-A...
• Keywords: Mode (computer interface)

ABSTRACT The vertical shear instability (VSI) is a promising mechanism to drive turbulence in protoplanetary discs. Numerical simulations the literature demonstrate that VSI non-linear saturation predominated by linear corrugation modes. These modes possess wavelengths crucially longer than radial wavelengths. This paper aims investigate natural wavelength of upon saturation, series numerical conducted Athena++ at different grid resolutions, disc aspect ratios, and viscosity parametrized ν. We find sign convergence emerges 64 cells per gas scale height for fiducial simulations, below which continuous reduction with resolution observed. Synthetic ALMA molecular line observations $^{12}\rm CO(2-1)$ are performed inspect observability feature, significantly diminished 32 or above. Flared viscous discs exhibiting may mitigate observational difficulty.