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Rossby Wave Instability in Astrophysical Discs
R. V. E. Lovelace, M. M. Romanova
A brief review is given of the Rossby wave instability (RWI) in astrophysical discs. In non-self-gravitating discs, around for example a newly forming stars, the instability can be…
MHD Simulations of Magnetospheric Accretion, Ejection and Plasma-field Interaction
M. M. Romanova, R. V. E. Lovelace, M. Bachetti +5
We review recent axisymmetric and three-dimensional (3D) magnetohydrodynamic (MHD) numerical simulations of magnetospheric accretion, plasma-field interaction and outflows from the…
Magnetospheric Accretions and the Inner Winds of Classical T Tauri Stars
Ryuichi Kurosawa, M. M. Romanova
Recent spectropolarimetric observations suggest that young low-mass stars such as classical T Tauri stars (CTTSs) possess relatively strong (~kG) magnetic field. This supports a sc…
Oscillations of the Boundary Layer and High-frequency QPOs
A. A. Blinova, M. Bachetti, M. M. Romanova
We observed persistent high-frequency oscillations of the boundary layer near an accreting, weakly-magnetized star in global 3D MHD simulations. The tilted dipole magnetic field is…
Boundary Between Stable and Unstable Regimes of Accretion
A. A. Blinova, R. V. E. Lovelace, M. M. Romanova
We investigated the boundary between stable and unstable regimes of accretion and its dependence on different parameters. Simulations were performed using a "cubed sphere" code wit…
Magnetospheric accretion on the fully-convective classical T Tauri star DN Tau
JF Donati, SG Gregory, SHP Alencar +7
We report here results of spectropolarimetric observations of the classical T Tauri star DN Tau carried out (at 2 epochs) with ESPaDOnS at the Canada-France-Hawaii Telescope within…