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Quasi-periodic oscillations and the global modes of magnetohydrodynamic, relativistic accretion disks

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If you have a question about this talk, please contact Dr William Béthune .

The high-frequency quasi-periodic oscillations (HFQPOs) that punctuate the light curves of X-ray binary systems present a window onto the intrinsic properties of stellar-mass black holes and hence a testbed for general relativity. One explanation for these features is that relativistic distortion of the accretion disc’s differential rotation creates a trapping region in which inertial waves (r-modes) might grow to observable amplitudes. In this talk, I will address previous local analyses predicting that this trapping region may be destroyed by large scale magnetic fields, presenting global calculations of r-modes in a magnetohydrodynamic model of a relativistic accretion flow.

This talk is part of the DAMTP Astro Lunch series.

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