https://doi.org/10.1051/epjconf/20136405009
Oscillations of the Boundary Layer and High-frequency QPOs
1 Department of Astronomy, Cornell University, Ithaca, NY 14853-6801, USA
2 Institut de Recherche en Astrophysique et Planetologie, Toulouse, 31400, France
a e-mail: alisablinova@gmail.com
Published online: 8 January 2014
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 not strong enough to open a gap between the star and the disk. Instead, it forms a highly-wrapped azimuthal field near the surface of the star which slows down rotation of the disk matter, while a small tilt of the field excites oscillations of the boundary layer with a frequency below the Keplerian frequency. This mechanism may be responsible for the high-frequency oscillations in accreting neutron stars, white dwarfs and classical T Tauri stars.
© Owned by the authors, published by EDP Sciences, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
