X-ray fluorescence from super-Eddington accreting black holes

Abstract

X-ray reverberation has proven to be a powerful tool capable of probing the innermost region of accretion disks around compact objects. Current theoretical effort generally assumes that the disk is geometrically thin, optically thick and orbiting with Keplerian speed. Thus, these models cannot be applied to systems where super-Eddington accretion happens because the thin disk approximation fails in this accretion regime. Furthermore, state-of-the-art numerical simulations show that optically thick winds are launched from the super-Eddington accretion disks, and thereby changing the reflection geometry significantly from the thin disk picture. We carry out theoretical investigations on this topic by focusing on the Fe K$\alpha$ fluorescent lines produced from super-Eddington disks, and show that their line profiles are shaped by the funnel geometry and wind acceleration. We also systematically compare the Fe line profiles from super-Eddington thick disks to those from thin disks, and find that the former are substantially more blueshifted and symmetric in shape. These results are consistent with the observed Fe K$\alpha$ line from the jetted tidal disruption event, Swift J1644, in which a transient super-Eddington accretion disk was formed out of stellar debris. Therefore, careful analysis of the Fe K$\alpha$ line profile can be used to identify systems undergoing super-Eddington accretion.

arXiv commentTypeset using LATEX default style in AASTeX61, 14 pages with 5 figures; updated and accepted to APJL

References in corpus (36)

• A relativistic jetted outburst from a massive black hole fed by a tidally disrupted star
• Discovery of the Onset of Rapid Accretion by a Dormant Massive Black Hole
• Hydrodynamical Simulations to Determine the Feeding Rate of Black Holes by the Tidal Disruption of Stars: The Importance of the Impact Parameter and Stellar Structure
• Measuring Black Hole Spin using X-ray Reflection Spectroscopy
• A Global Three Dimensional Radiation Magneto-hydrodynamic Simulation of Super-Eddington Accretion Disks
• A unified model for tidal disruption events
• Numerical simulations of super-critical black hole accretion flows in general relativity
• Three-Dimensional General Relativistic Radiation Magnetohydrodynamical Simulation of Super-Eddington Accretion, using a new code HARMRAD with M1 Closure
• The corona contracts in a black-hole transient
• X-ray reflection spectra from ionized slabs
• Understanding X-ray reflection emissivity profiles in AGN: Locating the X-ray source
• Global Radiation-Magnetohydrodynamic Simulations of Black Hole Accretion Flow and Outflow: Unified Model of Three States
• Resolved atomic lines reveal outflows in two ultraluminous X-ray sources
• Iron fluorescence from within the innermost stable orbit of black hole accretion disks
• Super-Eddington Accretion Disks around Supermassive black Holes
• Three-dimensional simulations of super-critical black hole accretion disks --- luminosities, photon trapping and variability
• Swift J1644+57 gone MAD: the case for dynamically-important magnetic flux threading the black hole in a jetted tidal disruption event
• X-ray iron line reverberation from black hole accretion disks
• Radio Monitoring of the Tidal Disruption Event Swift J164449.3+573451. I. Jet Energetics and the Pristine Parsec-Scale Environment of a Supermassive Black Hole
• The profile and equivalent width of the X-ray iron emission-line from a disk around a Kerr black hole
• Soft X-ray Temperature Tidal Disruption Events from Stars on Deep Plunging Orbits
• On the size and location of the X-ray emitting coronae around black holes
• The star ingesting luminosity of intermediate mass black holes in globular clusters
• X-ray Spectra from MHD Simulations of Accreting Black Holes
• The dynamics, appearance and demographics of relativistic jets triggered by tidal disruption of stars in quiescent supermassive black holes
• Ultrafast Outflow in Tidal Disruption Event ASASSN-14li
• Efficiency of Super-Eddington Magnetically-Arrested Accretion
• Relativistic reverberation in the accretion flow of a tidal disruption event
• Radiation Transfer of Emission Lines in Curved Space-Time
• Exploring The Effects Of Disk Thickness On The Black Hole Reflection Spectrum
• Radio observations of the tidal disruption event XMMSL1 J0740$-$85
• Magnetoluminescence
• Super-Eddington Accretion in Tidal Disruption Events: the Impact of Realistic Fallback Rates on Accretion Rates
• Iron K-alpha Emission from X-ray Reflection: Predictions for Gamma-Ray Burst Models
• Black hole magnetosphere with small scale flux tubes
• Iron line profiles and self-shadowing from relativistic thick accretion discs

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• Evolution of a Relativistic Outflow and X-ray Corona in the Extreme Changing-Look AGN 1ES 1927+654
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• Ejection-accretion connection in NLS1 AGN 1H 1934-063
• Relativistic X-ray reverberation from super-Eddington accretion flow
• Modeling Multiple X-Ray Reflection in Super-Eddington Winds
• Prospects for Time-Domain and Multi-Messenger Science with eXTP
• Generally Applicable Formalism for Modeling the Observable Signatures of Inflows, Outflows, and Moving Coronal Plasma Close to Kerr Black Holes
• Modeling reflection spectra of super-Eddington X-ray sources
• Accretion Geometry of Black Hole X-ray Binaries: Insights from X-ray Observations
• The Origin of X-ray Emission in the Gamma-ray emitting Narrow-Line Seyfert 1 1H 0323+342
• The Effects of Complex Accretion Disk Geometry on Broadened Iron K$\alpha$ Lines