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Accretion Funnel Reconfiguration during an Outburst in a Young Stellar Object: EX Lupi
Koshvendra Singh, Joe P. Ninan, Marina M. Romanova +14
EX Lupi, a low-mass young stellar object, went into an accretion-driven outburst in March of 2022. The outburst caused a sudden phase change of ~ 112 5 in…
Measuring the Density Structure of an Accretion Hot Spot
C. C. Espaillat, C. E. Robinson, M. M. Romanova +5
Magnetospheric accretion models predict that matter from protoplanetary disks accretes onto the star via funnel flows which follow the stellar field lines and shock on the stellar…
Modulated accretion in T Tauri star RY Tau -- stable MHD propeller or a planet at 0.2 AU?
P. P. Petrov, M. M. Romanova, K. N. Grankin +3
Planets are thought to form at the early stage of stellar evolution when the mass accretion is still ongoing. RY Tau is a T Tauri type star at the age of a few Myr, with accretion…
3D MHD Simulations of Accretion onto Stars with Tilted Magnetic and Rotational Axes
M. M. Romanova, A. V. Koldoba, G. V. Ustyugova +3
We present results of global three-dimensional (3D) magnetohydrodynamic (MHD) simulations of accretion onto magnetized stars where both the magnetic and rotational axes of the star…
Comparisons of MHD Propeller Model with Observations of Cataclysmic Variable AE Aqr
A. A. Blinova, M. M. Romanova, G. V. Ustyugova +2
We have developed a numerical MHD model of the propeller candidate star AE Aqr using axisymmetric magneto-hydrodynamic (MHD) simulations. We suggest that AE Aqr is an intermediate…
Properties of Strong and Weak Propellers from MHD Simulations
Marina M. Romanova, Alisa A. Blinova, Galina V. Ustyugova +2
We investigate the properties of magnetized stars in the propeller regime using axisymmetric numerical simulations. We modelled the propeller regime for stars with realistically la…