Testing the Kerr Black Hole Hypothesis with GX 339-4 by a combined analysis of its thermal spectrum and reflection features

Abstract

We analyze simultaneous observations with NuSTAR and Swift of the black hole binary GX 339-4 in which we clearly detect both a strong thermal component and prominent relativistic reflection features. We employ NKBB and RELXILL_NK, which are the state of the art of, respectively, the thermal and reflection models to test the Kerr black hole hypothesis. We obtain unprecedented precise measurements of the Johannsen deformation parameter ${\alpha }_{13}$: ${\alpha }_{13}=-0.012_{-0.039}^{+0.011}$ (lamppost coronal geometry) and ${\alpha }_{13}=-0.010_{-0.018}^{+0.024}$ (broken power-law emissivity profile) at a 90% confidence level, where the Kerr metric corresponds to ${\alpha }_{13}=0$. We investigate the systematic uncertainties by fitting the data with different models.

10 pages, 5 figures. v2: refereed version

References in corpus (21)

• Constraining Black Hole Spin Via X-ray Spectroscopy
• Gravitational Test Beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
• Thin accretion disks in stationary axisymmetric wormhole spacetimes
• A code to compute the emission of thin accretion disks in non-Kerr space-times and test the nature of black hole candidates
• A Grid of Relativistic, non-LTE Accretion Disk Models for Spectral Fitting of Black Hole Binaries
• Testing the space-time geometry around black hole candidates with the analysis of the broad K$\alpha$ iron line
• Testing Hořava-Lifshitz gravity using thin accretion disk properties
• High Density Reflection Spectroscopy: II. the Density of the Inner Black Hole Accretion Disc in AGN
• Profiles of emission lines generated by rings orbiting braneworld Kerr black holes
• Possible observational windows for quantum effects from black holes
• High Density Reflection Spectroscopy I. A case study of GX~339-4
• Public Release of RELXILL_NK: A Relativistic Reflection Model for Testing Einstein's Gravity
• Self-Consistent Black Hole Accretion Spectral Models and the Forgotten Role of Coronal Comptonization of Reflection Emission
• Testing the Kerr black hole hypothesis using X-ray reflection spectroscopy and a thin disk model with finite thickness
• Returning radiation in strong gravity around black holes: Reverberation from the accretion disc
• Impact of the returning radiation on the analysis of the reflection spectra of black holes
• Testing general relativity with the stellar-mass black hole in LMC X-1 using the continuum-fitting method
• XSPEC model for testing the Kerr black hole hypothesis 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
• Modeling uncertainties in X-ray reflection spectroscopy measurements II: Impact of the radiation from the plunging region
• Gravitational effects on the high energy emission of accreting black holes

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