Testing the Kerr nature of black hole candidates using iron line reverberation mapping in the Cardoso-Pani-Rico framework
Name
PhysRevD.93.123008.pdf
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2.98 MB
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Checksum (MD5)
54e92e88c21c7c746fea43499ca39d90
Author(s)
Jiang, Jiachen
Bambi, Cosimo
Steiner, James F
Date Issued
June 2016
Journal
Physical Review D
Publisher
American Physical Society
Citation
Jiang, Jiachen et al. “Testing the Kerr Nature of Black Hole Candidates Using Iron Line Reverberation Mapping in the Cardoso-Pani-Rico Framework.” Physical Review D 93, 12 (June 2016): 123008 © 2016 American Physical Society
Version
Final published version
Abstract
The iron Kα line commonly observed in the x-ray spectrum of black hole candidates is produced by x-ray fluorescence of the inner accretion disk. This line can potentially be quite a powerful tool to probe the spacetime geometry around these objects and test the Kerr black hole hypothesis. In a previous paper, we studied the ability to constrain possible deviations from the Kerr solution from the standard time-integrated iron line spectrum within the Cardoso-Pani-Rico framework. In the present work, we expand on that study and consider iron line reverberation mapping in the Cardoso-Pani-Rico framework. That is, we consider the time evolution of the iron line profile in response to fluctuations in the x-ray primary source. Our simulations clearly show that the time informatio n in reverberation mapping can better constrain the background metric than the time-integrated approach, and this is true, notably, for the deformation parameter ϵ[subscript 3][superscript r], which is only weakly informed by a time-integrated observation.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.93.123008
