Probing the near-horizon region of Cygnus X-1 with Suzaku and NuSTAR

Abstract

Astrophysical black holes are ideal laboratories for testing Einstein's theory of general relativity in the strong field regime. In this manuscript, we present an analysis of Suzaku and NuSTAR spectra of the black hole binary Cygnus X-1 using RELXILL_NK. Unlike our previous study on Cygnus X-1 with NuSTAR data, here we are able to constrain the Johannsen deformation parameter ${\alpha }_{13}$. However, despite the high energy resolution near the iron line provided by Suzaku, our constraints on the Kerr metric from Cygnus X-1 are not very stringent in comparison with those that have been obtained from other sources, confirming that Cygnus X-1 is quite a complicated source.

arXiv comment16 pages, 9 figures. v2: refereed version

References in corpus (54)

• On the Absorption of X-rays in the Interstellar Medium
• The Confrontation between General Relativity and Experiment
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• Tests of general relativity with GW150914
• Kerr black holes with scalar hair
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• Cosmological Tests of Modified Gravity
• Theoretical Physics Implications of the Binary Black-Hole Mergers GW150914 and GW151226
• X-ray reflected spectra from accretion disk models. III. A complete grid of ionized reflection calculations
• Testing the rotational nature of the supermassive object M87* from the circularity and size of its first image
• Measuring Black Hole Spin using X-ray Reflection Spectroscopy
• Irradiation of an Accretion Disc by a Jet: General Properties and Implications for Spin Measurements of Black Holes
• The Mass of the Black Hole in Cygnus X-1
• Gravitational Test Beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
• Testing black hole candidates with electromagnetic radiation
• Simulations of Magnetized Disks Around Black Holes: Effects of Black Hole Spin, Disk Thickness, and Magnetic Field Geometry
• Cosmological Tests of Gravity
• The Extreme Spin of the Black Hole in Cygnus X-1
• Regular Black Hole Metric with Three Constants of Motion
• The Trigonometric Parallax of Cygnus X-1
• Broad iron K-alpha emission lines as a diagnostic of black hole spin
• Slowly-Rotating Black Holes in Einstein-Dilaton-Gauss-Bonnet Gravity: Quadratic Order in Spin Solutions
• Dependence of inner accretion disk stress on parameters: the Schwarzschild case
• Cosmological Tests of Gravity
• Confirmation Via the Continuum-Fitting Method that the Spin of the Black Hole in Cygnus X-1 is Extreme
• Testing the Kerr black hole hypothesis using X-ray reflection spectroscopy
• The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku
• On the determination of the spin of the black hole in Cyg X-1 from X-ray reflection spectra
• Alternative explanations for extreme supersolar iron abundances inferred from the energy spectrum of Cygnus X-1
• NuSTAR and Suzaku observations of the hard state in Cygnus X-1: locating the inner accretion disk
• Measuring Black Hole Spin by the Continuum-Fitting Method: Effect of Deviations from the Novikov-Thorne Disc Model
• The Soft State of Cygnus X-1 Observed with NuSTAR: A Variable Corona and a Stable Inner Disk
• Astrophysical Black Holes: A Compact Pedagogical Review
• Possible observational windows for quantum effects from black holes
• Testing general relativity with the reflection spectrum of the supermassive black hole in 1H0707$-$495
• X-ray Modeling of Very Young Early Type Stars in the Orion Trapezium: Signatures of Magnetically Confined Plasmas and Evolutionary Implications
• Event Horizon Telescope Observations as Probes for Quantum Structure of Astrophysical Black Holes
• Towards precision tests of general relativity with black hole X-ray reflection spectroscopy
• Self-Consistent Black Hole Accretion Spectral Models and the Forgotten Role of Coronal Comptonization of Reflection Emission
• Public Release of RELXILL_NK: A Relativistic Reflection Model for Testing Einstein's Gravity
• Constraints on the spacetime metric around seven "bare" AGNs using X-ray reflection spectroscopy
• Note on the effect of a massive accretion disk in the measurements of black hole spins
• On the Role of the Accretion Disk in Black Hole Disk-Jet Connections
• Testing the Kerr black hole hypothesis using X-ray reflection spectroscopy and a thin disk model with finite thickness
• Black holes as antimatter factories
• The broad iron Kalpha line of Cygnus X-1 as seen by XMM-Newton in the EPIC-pn modified timing mode
• Reflection spectra of thick accretion disks
• Tests of the Kerr hypothesis with GRS 1915+105 using different RELXILL flavors
• Modeling bias in supermassive black hole spin measurements
• Testing general relativity with the stellar-mass black hole in LMC X-1 using the continuum-fitting method
• Testing the Kerr hypothesis using X-ray reflection spectroscopy with NuSTAR data of Cygnus X-1 in the soft state
• About the Kerr nature of the stellar-mass black hole in GRS 1915+105
• Testing the Kerr metric using X-ray reflection spectroscopy: spectral analysis of GX 339-4
• Testing the Keplerian disk hypothesis using X-ray reflection spectroscopy

Cited by in corpus (6)

• Testing the Kerr black hole hypothesis with GRS 1716-249 by combining the continuum-fitting and the iron-line methods
• Testing General Relativity with black hole X-ray data: a progress report
• Constraining the Konoplya-Rezzolla-Zhidenko deformation parameters II: limits from stellar-mass black hole X-ray data
• Testing Gravity with Black Hole X-Ray Data
• Tests of General Relativity using black hole X-ray data
• Assessing systematic uncertainties from spectral re-analysis of Cyg X-1 with different coronal geometries