The Bright accretion rings on magnetic T Tauri stars

摘要

We model the properties of bright rings on accreting classical T Tauri stars whose magnetospheres are tilted with respect to the axis of rotation. These rings have interesting geometries and azimuthal intensity profiles depending on β, the inclination angle of the dipole field, ξ, the ratio of the star's radius to the accretion radius, and ∈, the ratio of the star's luminosity to the total ring luminosity. As the star rotates, the rings may be occulted periodically, and the apparent brightness of the star may Vary as a function of time.