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- W3100252939 abstract "We propose a new model for these QPOs based on forced oscillations induced in the accretion disk due to the stellar magnetic field. First, it is shown that a magnetized accretion disk evolving in a rotating nonaxisymmetric magnetic field anchored to a neutron star will be subject to three kinds of resonances: a corotation resonance, a Lindblad resonance due to a driving force, and a parametric resonance due to the time varying epicyclic frequencies. In the second part of the paper, we focus on the linear response of a thin accretion disk, developing the density perturbation as the sum of free wave solutions and non-wavelike disturbances. In the last part, we show results of 2D numerical simulations of a simplified version of the accretion disk consisting of a column of plasma threaded by a vertical magnetic field. It is argued that the nearly periodic motion induced in the disk will produce high quality factor QPOs." @default.
- W3100252939 created "2020-11-23" @default.
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- W3100252939 date "2005-07-29" @default.
- W3100252939 modified "2023-10-15" @default.
- W3100252939 title "Forced oscillations in magnetized accretion disks and QPOs" @default.
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- W3100252939 doi "https://doi.org/10.1051/0004-6361:20041511" @default.
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