Iron line variability of discoseismic corrugation modes

David Tsang, Iryna Butsky

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10 Citations (SciVal)


Using a fast semi-analytic raytracing code, we study the variability of relativistically broadened Fe-Kα lines due to discoseismic oscillations concentrated in the innermost regions of accretion discs around black holes. The corrugation mode, or c-mode, is of particular interest as its natural frequency corresponds well to the ˜0.1-15 Hz range observed for low-frequency quasi-periodic oscillations (LFQPOs) for lower spins. Comparison of the oscillation phase dependent variability and quasi-periodic oscillation-phase stacked Fe-Kα line observations will allow such discoseismic models to be confirmed or ruled out as a source of particular LFQPOs. The spectral range and frequency of the variability of the Fe-Kα line due to c-modes can also potentially be used to constrain the black hole spin if observed with sufficient temporal and spectral resolution.
Original languageEnglish
Pages (from-to)749-765
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Publication statusPublished - 11 Oct 2013


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