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Iron Line Variability of Discoseismic Corrugation Modes

Tsang, David and Butsky, Iryna (2013) Iron Line Variability of Discoseismic Corrugation Modes. Monthly Notices of the Royal Astronomical Society, 435 (1). pp. 749-765. ISSN 0035-8711.

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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.

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Additional Information:© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society Accepted 2013 July 18. Received 2013 June 14; in original form 2013 January 17. First published online: August 16, 2013. DT was supported at Caltech by the Sherman Fairchild Foundation and at McGill through funding from the Canadian Institute for Advanced Research and the Lorne Trottier Chair in Astrophysics and Cosmology. IB conducted this research as part of a Summer Undergraduate Research Fellowship, and was supported by NASA ATP grant no. NNX11AC37G, NSF grant no. PHY-1151197, the David and Lucile Packard Foundation, the Alfred P. Sloan Foundation, Mrs Albert Burford and the Sherman Fairchild Foundation. DT would like to acknowledge helpful discussion and useful advice from Sterl Phinney, Peter Goldreich, Christian Ott, Chris Hirata, Dong Lai, Marc Favata, Anil Zenigoulu, Chad Galley and Andrew Cumming.
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Canadian Institute for Advanced Research (CIAR)UNSPECIFIED
Lorne Trottier Chair in Astrophysics and CosmologyUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Subject Keywords:accretion, accretion discs; black hole physics; hydrodynamics; line: profiles; waves; X-rays: binaries
Issue or Number:1
Record Number:CaltechAUTHORS:20130805-080029527
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39751
Deposited By: Tony Diaz
Deposited On:12 Aug 2013 21:08
Last Modified:03 Oct 2019 05:10

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